79797081 has 32 divisors (see below), whose sum is σ = 131604480. Its totient is φ = 41880384.

The previous prime is 79797079. The next prime is 79797101. The reversal of 79797081 is 18079797.

It is not a de Polignac number, because 79797081 - 2¹ = 79797079 is a prime.

It is a super-2 number, since 2×79797081² = 12735148272241122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 79797081.

It is not an unprimeable number, because it can be changed into a prime (79797041) 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 31 ways as a sum of consecutive naturals, for example, 64636 + ... + 65858.

It is an arithmetic number, because the mean of its divisors is an integer number (4112640).

Almost surely, 2^79797081 is an apocalyptic number.

It is an amenable number.

79797081 is a deficient number, since it is larger than the sum of its proper divisors (51807399).

79797081 is a wasteful number, since it uses less digits than its factorization.

79797081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1485.

The product of its (nonzero) digits is 222264, while the sum is 48.

The square root of 79797081 is about 8932.9211907416. The cubic root of 79797081 is about 430.5223164356.

The spelling of 79797081 in words is "seventy-nine million, seven hundred ninety-seven thousand, eighty-one".