79275577 has 2 divisors, whose sum is σ = 79275578. Its totient is φ = 79275576.

The previous prime is 79275569. The next prime is 79275611. The reversal of 79275577 is 77557297.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63107136 + 16168441 = 7944^2 + 4021^2 .

It is a cyclic number.

It is not a de Polignac number, because 79275577 - 2³ = 79275569 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79275577.

It is not a weakly prime, because it can be changed into another prime (79275877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39637788 + 39637789.

It is an arithmetic number, because the mean of its divisors is an integer number (39637789).

Almost surely, 2^79275577 is an apocalyptic number.

It is an amenable number.

79275577 is a deficient number, since it is larger than the sum of its proper divisors (1).

79275577 is an equidigital number, since it uses as much as digits as its factorization.

79275577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080450, while the sum is 49.

The square root of 79275577 is about 8903.6833389334. The cubic root of 79275577 is about 429.5823906616.

The spelling of 79275577 in words is "seventy-nine million, two hundred seventy-five thousand, five hundred seventy-seven".