189505239 has 96 divisors (see below), whose sum is σ = 347493888. Its totient is φ = 89548800.

The previous prime is 189505229. The next prime is 189505241. The reversal of 189505239 is 932505981.

It is not a de Polignac number, because 189505239 - 2⁵ = 189505207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 189505239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189505229) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1771024 + ... + 1771130.

It is an arithmetic number, because the mean of its divisors is an integer number (3619728).

Almost surely, 2^189505239 is an apocalyptic number.

189505239 is a deficient number, since it is larger than the sum of its proper divisors (157988649).

189505239 is a wasteful number, since it uses less digits than its factorization.

189505239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 186 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 42.

The square root of 189505239 is about 13766.0901856700. The cubic root of 189505239 is about 574.3902688543.

The spelling of 189505239 in words is "one hundred eighty-nine million, five hundred five thousand, two hundred thirty-nine".