79905623 has 8 divisors (see below), whose sum is σ = 93184800. Its totient is φ = 68490240.

The previous prime is 79905619. The next prime is 79905629. The reversal of 79905623 is 32650997.

It is not a de Polignac number, because 79905623 - 2² = 79905619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79905629) 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, 116138 + ... + 116823.

It is an arithmetic number, because the mean of its divisors is an integer number (11648100).

Almost surely, 2^79905623 is an apocalyptic number.

79905623 is a deficient number, since it is larger than the sum of its proper divisors (13279177).

79905623 is an equidigital number, since it uses as much as digits as its factorization.

79905623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232982 (or 232968 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 41.

The square root of 79905623 is about 8938.9945184008. The cubic root of 79905623 is about 430.7174304299.

The spelling of 79905623 in words is "seventy-nine million, nine hundred five thousand, six hundred twenty-three".