198873523 has 2 divisors, whose sum is σ = 198873524. Its totient is φ = 198873522.

The previous prime is 198873449. The next prime is 198873607. The reversal of 198873523 is 325378891.

It is a weak prime.

It is an emirp because it is prime and its reverse (325378891) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198873523 is a prime.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99436761 + 99436762.

It is an arithmetic number, because the mean of its divisors is an integer number (99436762).

Almost surely, 2^198873523 is an apocalyptic number.

198873523 is a deficient number, since it is larger than the sum of its proper divisors (1).

198873523 is an equidigital number, since it uses as much as digits as its factorization.

198873523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 46.

The square root of 198873523 is about 14102.2524087466. The cubic root of 198873523 is about 583.7035335729.

It can be divided in two parts, 198873 and 523, that added together give a triangular number (199396 = T₆₃₁).

The spelling of 198873523 in words is "one hundred ninety-eight million, eight hundred seventy-three thousand, five hundred twenty-three".