189536479 has 4 divisors (see below), whose sum is σ = 206767080. Its totient is φ = 172305880.

The previous prime is 189536471. The next prime is 189536507. The reversal of 189536479 is 974635981.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 189536479 - 2³ = 189536471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189536471) 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, 8615284 + ... + 8615305.

It is an arithmetic number, because the mean of its divisors is an integer number (51691770).

Almost surely, 2^189536479 is an apocalyptic number.

189536479 is a deficient number, since it is larger than the sum of its proper divisors (17230601).

189536479 is a wasteful number, since it uses less digits than its factorization.

189536479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17230600.

The product of its digits is 1632960, while the sum is 52.

The square root of 189536479 is about 13767.2248111230. The cubic root of 189536479 is about 574.4218299273.

The spelling of 189536479 in words is "one hundred eighty-nine million, five hundred thirty-six thousand, four hundred seventy-nine".