79640899 has 8 divisors (see below), whose sum is σ = 85946000. Its totient is φ = 73361376.

The previous prime is 79640867. The next prime is 79640921. The reversal of 79640899 is 99804697.

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 79640899 - 2⁵ = 79640867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79640839) 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, 349 + ... + 12625.

It is an arithmetic number, because the mean of its divisors is an integer number (10743250).

Almost surely, 2^79640899 is an apocalyptic number.

79640899 is a deficient number, since it is larger than the sum of its proper divisors (6305101).

79640899 is a wasteful number, since it uses less digits than its factorization.

79640899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12789.

The product of its (nonzero) digits is 979776, while the sum is 52.

The square root of 79640899 is about 8924.1749758731. The cubic root of 79640899 is about 430.2412545576.

The spelling of 79640899 in words is "seventy-nine million, six hundred forty thousand, eight hundred ninety-nine".