79445817 has 18 divisors (see below), whose sum is σ = 126137466. Its totient is φ = 48148320.

The previous prime is 79445803. The next prime is 79445831. The reversal of 79445817 is 71854497.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (79445803) and next prime (79445831).

It can be written as a sum of positive squares in only one way, i.e., 66977856 + 12467961 = 8184^2 + 3531^2 .

It is not a de Polignac number, because 79445817 - 2⁶ = 79445753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79445017) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 35388 + ... + 37565.

It is an arithmetic number, because the mean of its divisors is an integer number (7007637).

Almost surely, 2^79445817 is an apocalyptic number.

It is an amenable number.

79445817 is a deficient number, since it is larger than the sum of its proper divisors (46691649).

79445817 is a wasteful number, since it uses less digits than its factorization.

79445817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72981 (or 72967 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 79445817 is about 8913.2383004158. The cubic root of 79445817 is about 429.8896724342.

The spelling of 79445817 in words is "seventy-nine million, four hundred forty-five thousand, eight hundred seventeen".