79665953 has 4 divisors (see below), whose sum is σ = 79691028. Its totient is φ = 79640880.

The previous prime is 79665941. The next prime is 79665991. The reversal of 79665953 is 35956697.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67436944 + 12229009 = 8212^2 + 3497^2 .

It is a cyclic number.

It is not a de Polignac number, because 79665953 - 2⁶ = 79665889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79665253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6938 + ... + 14403.

It is an arithmetic number, because the mean of its divisors is an integer number (19922757).

Almost surely, 2^79665953 is an apocalyptic number.

It is an amenable number.

79665953 is a deficient number, since it is larger than the sum of its proper divisors (25075).

79665953 is a wasteful number, since it uses less digits than its factorization.

79665953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25074.

The product of its digits is 1530900, while the sum is 50.

The square root of 79665953 is about 8925.5785806860. The cubic root of 79665953 is about 430.2863659446.

The spelling of 79665953 in words is "seventy-nine million, six hundred sixty-five thousand, nine hundred fifty-three".