79912985 has 16 divisors (see below), whose sum is σ = 97770240. Its totient is φ = 62690880.

The previous prime is 79912961. The next prime is 79912997. The reversal of 79912985 is 58921997.

It is a happy number.

It is not a de Polignac number, because 79912985 - 2¹⁰ = 79911961 is a prime.

It is a super-2 number, since 2×79912985² = 12772170343220450, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80804 + ... + 81786.

It is an arithmetic number, because the mean of its divisors is an integer number (6110640).

Almost surely, 2^79912985 is an apocalyptic number.

It is an amenable number.

79912985 is a deficient number, since it is larger than the sum of its proper divisors (17857255).

79912985 is a wasteful number, since it uses less digits than its factorization.

79912985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288.

The product of its digits is 408240, while the sum is 50.

The square root of 79912985 is about 8939.4063001969. The cubic root of 79912985 is about 430.7306578859.

The spelling of 79912985 in words is "seventy-nine million, nine hundred twelve thousand, nine hundred eighty-five".