189331239 has 8 divisors (see below), whose sum is σ = 263417472. Its totient is φ = 120732920.

The previous prime is 189331231. The next prime is 189331243. The reversal of 189331239 is 932133981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 189331239 - 2³ = 189331231 is a prime.

It is a super-2 number, since 2×189331239² = 71692636122550242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 189331197 and 189331206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189331231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1371897 + ... + 1372034.

It is an arithmetic number, because the mean of its divisors is an integer number (32927184).

Almost surely, 2^189331239 is an apocalyptic number.

189331239 is a deficient number, since it is larger than the sum of its proper divisors (74086233).

189331239 is a wasteful number, since it uses less digits than its factorization.

189331239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2743957.

The product of its digits is 34992, while the sum is 39.

The square root of 189331239 is about 13759.7688570702. The cubic root of 189331239 is about 574.2144170559.

The spelling of 189331239 in words is "one hundred eighty-nine million, three hundred thirty-one thousand, two hundred thirty-nine".