79797393 has 20 divisors (see below), whose sum is σ = 128374708. Its totient is φ = 49105440.

The previous prime is 79797391. The next prime is 79797401. The reversal of 79797393 is 39379797.

It can be written as a sum of positive squares in 2 ways, for example, as 13749264 + 66048129 = 3708^2 + 8127^2 .

It is not a de Polignac number, because 79797393 - 2¹ = 79797391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79797391) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 36838 + ... + 38943.

Almost surely, 2^79797393 is an apocalyptic number.

It is an amenable number.

79797393 is a deficient number, since it is larger than the sum of its proper divisors (48577315).

79797393 is a wasteful number, since it uses less digits than its factorization.

79797393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75806 (or 75797 counting only the distinct ones).

The product of its digits is 2250423, while the sum is 54.

The square root of 79797393 is about 8932.9386542168. The cubic root of 79797393 is about 430.5228775372.

The spelling of 79797393 in words is "seventy-nine million, seven hundred ninety-seven thousand, three hundred ninety-three".