79572173 has 2 divisors, whose sum is σ = 79572174. Its totient is φ = 79572172.

The previous prime is 79572161. The next prime is 79572191. The reversal of 79572173 is 37127597.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77492809 + 2079364 = 8803^2 + 1442^2 .

It is a cyclic number.

It is not a de Polignac number, because 79572173 - 2¹² = 79568077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79572173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79572113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39786086 + 39786087.

It is an arithmetic number, because the mean of its divisors is an integer number (39786087).

Almost surely, 2^79572173 is an apocalyptic number.

It is an amenable number.

79572173 is a deficient number, since it is larger than the sum of its proper divisors (1).

79572173 is an equidigital number, since it uses as much as digits as its factorization.

79572173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92610, while the sum is 41.

The square root of 79572173 is about 8920.3235927852. The cubic root of 79572173 is about 430.1174602494.

The spelling of 79572173 in words is "seventy-nine million, five hundred seventy-two thousand, one hundred seventy-three".