79840799 has 4 divisors (see below), whose sum is σ = 82593960. Its totient is φ = 77087640.

The previous prime is 79840781. The next prime is 79840801. The reversal of 79840799 is 99704897.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99704897 = 31 ⋅3216287.

It is a cyclic number.

It is not a de Polignac number, because 79840799 - 2⁸ = 79840543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79840799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79840769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1376537 + ... + 1376594.

It is an arithmetic number, because the mean of its divisors is an integer number (20648490).

Almost surely, 2^79840799 is an apocalyptic number.

79840799 is a deficient number, since it is larger than the sum of its proper divisors (2753161).

79840799 is a wasteful number, since it uses less digits than its factorization.

79840799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2753160.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The square root of 79840799 is about 8935.3678715540. The cubic root of 79840799 is about 430.6009247348.

The spelling of 79840799 in words is "seventy-nine million, eight hundred forty thousand, seven hundred ninety-nine".