79892561 has 8 divisors (see below), whose sum is σ = 91434624. Its totient is φ = 68382720.

The previous prime is 79892557. The next prime is 79892567. The reversal of 79892561 is 16529897.

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

It is not a de Polignac number, because 79892561 - 2² = 79892557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79892567) 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, 2480 + ... + 12881.

It is an arithmetic number, because the mean of its divisors is an integer number (11429328).

Almost surely, 2^79892561 is an apocalyptic number.

It is an amenable number.

79892561 is a deficient number, since it is larger than the sum of its proper divisors (11542063).

79892561 is a wasteful number, since it uses less digits than its factorization.

79892561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16111.

The product of its digits is 272160, while the sum is 47.

The square root of 79892561 is about 8938.2638694547. The cubic root of 79892561 is about 430.6939596675.

The spelling of 79892561 in words is "seventy-nine million, eight hundred ninety-two thousand, five hundred sixty-one".