88888999 has 2 divisors, whose sum is σ = 88889000. Its totient is φ = 88888998.

The previous prime is 88888981. The next prime is 88889027. The reversal of 88888999 is 99988888.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 88888999 - 2¹⁷ = 88757927 is a prime.

It is a Chen prime.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88888909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44444499 + 44444500.

It is an arithmetic number, because the mean of its divisors is an integer number (44444500).

Almost surely, 2^88888999 is an apocalyptic number.

88888999 is a deficient number, since it is larger than the sum of its proper divisors (1).

88888999 is an equidigital number, since it uses as much as digits as its factorization.

88888999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23887872, while the sum is 67.

The square root of 88888999 is about 9428.0962553423. The cubic root of 88888999 is about 446.2888176681.

It can be divided in two parts, 888889 and 99, that multiplied together give a triangular number (88000011 = T₁₃₂₆₆).

The spelling of 88888999 in words is "eighty-eight million, eight hundred eighty-eight thousand, nine hundred ninety-nine".