189678239 has 8 divisors (see below), whose sum is σ = 190983168. Its totient is φ = 188377560.

The previous prime is 189678227. The next prime is 189678257. The reversal of 189678239 is 932876981.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189678239 is a prime.

It is a super-2 number, since 2×189678239² = 71955668700282242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189672239) 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, 173954 + ... + 175040.

It is an arithmetic number, because the mean of its divisors is an integer number (23872896).

Almost surely, 2^189678239 is an apocalyptic number.

189678239 is a deficient number, since it is larger than the sum of its proper divisors (1304929).

189678239 is a wasteful number, since it uses less digits than its factorization.

189678239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2125.

The product of its digits is 1306368, while the sum is 53.

The square root of 189678239 is about 13772.3723083570. The cubic root of 189678239 is about 574.5650033262.

The spelling of 189678239 in words is "one hundred eighty-nine million, six hundred seventy-eight thousand, two hundred thirty-nine".