189108239 has 4 divisors (see below), whose sum is σ = 189154656. Its totient is φ = 189061824.

The previous prime is 189108167. The next prime is 189108251. The reversal of 189108239 is 932801981.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189108239 is a prime.

It is a super-2 number, since 2×189108239² = 71523852115362242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 189108196 and 189108205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189108839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16439 + ... + 25464.

It is an arithmetic number, because the mean of its divisors is an integer number (47288664).

Almost surely, 2^189108239 is an apocalyptic number.

189108239 is a deficient number, since it is larger than the sum of its proper divisors (46417).

189108239 is an equidigital number, since it uses as much as digits as its factorization.

189108239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46416.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 189108239 is about 13751.6631357811. The cubic root of 189108239 is about 573.9888861782.

The spelling of 189108239 in words is "one hundred eighty-nine million, one hundred eight thousand, two hundred thirty-nine".