79715797 has 12 divisors (see below), whose sum is σ = 95239020. Its totient is φ = 66479616.

The previous prime is 79715791. The next prime is 79715813. The reversal of 79715797 is 79751797.

It can be written as a sum of positive squares in 2 ways, for example, as 63345681 + 16370116 = 7959^2 + 4046^2 .

It is not a de Polignac number, because 79715797 - 2³ = 79715789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79715791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20172 + ... + 23797.

It is an arithmetic number, because the mean of its divisors is an integer number (7936585).

Almost surely, 2^79715797 is an apocalyptic number.

It is an amenable number.

79715797 is a deficient number, since it is larger than the sum of its proper divisors (15523223).

79715797 is a wasteful number, since it uses less digits than its factorization.

79715797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44020 (or 44013 counting only the distinct ones).

The product of its digits is 972405, while the sum is 52.

The square root of 79715797 is about 8928.3703440214. The cubic root of 79715797 is about 430.3760852516.

The spelling of 79715797 in words is "seventy-nine million, seven hundred fifteen thousand, seven hundred ninety-seven".