79198857 has 8 divisors (see below), whose sum is σ = 117331680. Its totient is φ = 52799220.

The previous prime is 79198853. The next prime is 79198877. The reversal of 79198857 is 75889197.

It is not a de Polignac number, because 79198857 - 2² = 79198853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79198853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1466619 + ... + 1466672.

It is an arithmetic number, because the mean of its divisors is an integer number (14666460).

Almost surely, 2^79198857 is an apocalyptic number.

It is an amenable number.

79198857 is a deficient number, since it is larger than the sum of its proper divisors (38132823).

79198857 is a wasteful number, since it uses less digits than its factorization.

79198857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2933300 (or 2933294 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 54.

The square root of 79198857 is about 8899.3739667462. The cubic root of 79198857 is about 429.4437678991.

The spelling of 79198857 in words is "seventy-nine million, one hundred ninety-eight thousand, eight hundred fifty-seven".