79220765 has 16 divisors (see below), whose sum is σ = 108401328. Its totient is φ = 55059456.

The previous prime is 79220759. The next prime is 79220789. The reversal of 79220765 is 56702297.

It can be written as a sum of positive squares in 8 ways, for example, as 6255001 + 72965764 = 2501^2 + 8542^2 .

It is a cyclic number.

It is not a de Polignac number, because 79220765 - 2¹⁴ = 79204381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34742 + ... + 36951.

It is an arithmetic number, because the mean of its divisors is an integer number (6775083).

Almost surely, 2^79220765 is an apocalyptic number.

It is an amenable number.

79220765 is a deficient number, since it is larger than the sum of its proper divisors (29180563).

79220765 is a wasteful number, since it uses less digits than its factorization.

79220765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71728.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 79220765 is about 8900.6047547344. The cubic root of 79220765 is about 429.4833618489.

The spelling of 79220765 in words is "seventy-nine million, two hundred twenty thousand, seven hundred sixty-five".