79217690 has 16 divisors (see below), whose sum is σ = 144311328. Its totient is φ = 31304976.

The previous prime is 79217689. The next prime is 79217693. The reversal of 79217690 is 9671297.

It is a happy number.

It is a super-2 number, since 2×79217690² = 12550884817872200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79217693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46892 + ... + 48551.

It is an arithmetic number, because the mean of its divisors is an integer number (9019458).

Almost surely, 2^79217690 is an apocalyptic number.

79217690 is a deficient number, since it is larger than the sum of its proper divisors (65093638).

79217690 is a wasteful number, since it uses less digits than its factorization.

79217690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95533.

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 79217690 is about 8900.4320119868. The cubic root of 79217690 is about 429.4778048949.

The spelling of 79217690 in words is "seventy-nine million, two hundred seventeen thousand, six hundred ninety".