79396821903 has 32 divisors (see below), whose sum is σ = 121511104000. Its totient is φ = 45172826496.

The previous prime is 79396821883. The next prime is 79396821923. The reversal of 79396821903 is 30912869397.

It is an interprime number because it is at equal distance from previous prime (79396821883) and next prime (79396821923).

It is not a de Polignac number, because 79396821903 - 2⁵ = 79396821871 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 (79396821923) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8487873 + ... + 8497221.

It is an arithmetic number, because the mean of its divisors is an integer number (3797222000).

Almost surely, 2^79396821903 is an apocalyptic number.

79396821903 is a deficient number, since it is larger than the sum of its proper divisors (42114282097).

79396821903 is a wasteful number, since it uses less digits than its factorization.

79396821903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11071.

The product of its (nonzero) digits is 4408992, while the sum is 57.

The spelling of 79396821903 in words is "seventy-nine billion, three hundred ninety-six million, eight hundred twenty-one thousand, nine hundred three".