79974855 has 12 divisors (see below), whose sum is σ = 138623160. Its totient is φ = 42653232.

The previous prime is 79974803. The next prime is 79974859. The reversal of 79974855 is 55847997.

79974855 is a `hidden beast` number, since 79 + 97 + 485 + 5 = 666.

It is not a de Polignac number, because 79974855 - 2¹⁷ = 79843783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79974859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 888565 + ... + 888654.

It is an arithmetic number, because the mean of its divisors is an integer number (11551930).

Almost surely, 2^79974855 is an apocalyptic number.

79974855 is a deficient number, since it is larger than the sum of its proper divisors (58648305).

79974855 is a wasteful number, since it uses less digits than its factorization.

79974855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777230 (or 1777227 counting only the distinct ones).

The product of its digits is 3175200, while the sum is 54.

The square root of 79974855 is about 8942.8661512962. The cubic root of 79974855 is about 430.8417888922.

The spelling of 79974855 in words is "seventy-nine million, nine hundred seventy-four thousand, eight hundred fifty-five".