79775125 has 8 divisors (see below), whose sum is σ = 99559512. Its totient is φ = 63820000.

The previous prime is 79775107. The next prime is 79775131. The reversal of 79775125 is 52157797.

It can be written as a sum of positive squares in 4 ways, for example, as 3352561 + 76422564 = 1831^2 + 8742^2 .

It is not a de Polignac number, because 79775125 - 2⁹ = 79774613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318976 + ... + 319225.

It is an arithmetic number, because the mean of its divisors is an integer number (12444939).

Almost surely, 2^79775125 is an apocalyptic number.

It is an amenable number.

79775125 is a deficient number, since it is larger than the sum of its proper divisors (19784387).

79775125 is an equidigital number, since it uses as much as digits as its factorization.

79775125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638216 (or 638206 counting only the distinct ones).

The product of its digits is 154350, while the sum is 43.

The square root of 79775125 is about 8931.6921689006. The cubic root of 79775125 is about 430.4828270419.

The spelling of 79775125 in words is "seventy-nine million, seven hundred seventy-five thousand, one hundred twenty-five".