79995399 has 12 divisors (see below), whose sum is σ = 117238968. Its totient is φ = 48481840.

The previous prime is 79995397. The next prime is 79995401. The reversal of 79995399 is 99359997.

It is an interprime number because it is at equal distance from previous prime (79995397) and next prime (79995401).

It is not a de Polignac number, because 79995399 - 2¹ = 79995397 is a prime.

It is a super-2 number, since 2×79995399² = 12798527722338402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79995397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109824 + ... + 110549.

It is an arithmetic number, because the mean of its divisors is an integer number (9769914).

Almost surely, 2^79995399 is an apocalyptic number.

79995399 is a deficient number, since it is larger than the sum of its proper divisors (37243569).

79995399 is a wasteful number, since it uses less digits than its factorization.

79995399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220398 (or 220387 counting only the distinct ones).

The product of its digits is 6200145, while the sum is 60.

The square root of 79995399 is about 8944.0147025818. The cubic root of 79995399 is about 430.8786773863.

The spelling of 79995399 in words is "seventy-nine million, nine hundred ninety-five thousand, three hundred ninety-nine".