79877943 has 24 divisors (see below), whose sum is σ = 118441440. Its totient is φ = 51854400.

The previous prime is 79877933. The next prime is 79877969. The reversal of 79877943 is 34977897.

It is not a de Polignac number, because 79877943 - 2¹⁴ = 79861559 is a prime.

It is a super-2 number, since 2×79877943² = 12760971555822498, 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 79877943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79877923) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71473 + ... + 72581.

It is an arithmetic number, because the mean of its divisors is an integer number (4935060).

Almost surely, 2^79877943 is an apocalyptic number.

79877943 is a deficient number, since it is larger than the sum of its proper divisors (38563497).

79877943 is a wasteful number, since it uses less digits than its factorization.

79877943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319 (or 1316 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 54.

The square root of 79877943 is about 8937.4461117257. The cubic root of 79877943 is about 430.6676899362.

The spelling of 79877943 in words is "seventy-nine million, eight hundred seventy-seven thousand, nine hundred forty-three".