79897939 has 8 divisors (see below), whose sum is σ = 87528960. Its totient is φ = 72328200.

The previous prime is 79897931. The next prime is 79897967. The reversal of 79897939 is 93979897.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79897939 - 2³ = 79897931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79897931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12567 + ... + 17824.

It is an arithmetic number, because the mean of its divisors is an integer number (10941120).

Almost surely, 2^79897939 is an apocalyptic number.

79897939 is a deficient number, since it is larger than the sum of its proper divisors (7631021).

79897939 is a wasteful number, since it uses less digits than its factorization.

79897939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30641.

The product of its digits is 7715736, while the sum is 61.

The square root of 79897939 is about 8938.5647058127. The cubic root of 79897939 is about 430.7036235633.

The spelling of 79897939 in words is "seventy-nine million, eight hundred ninety-seven thousand, nine hundred thirty-nine".