79812999 has 16 divisors (see below), whose sum is σ = 135133440. Its totient is φ = 45607320.

The previous prime is 79812983. The next prime is 79813007. The reversal of 79812999 is 99921897.

It is not a de Polignac number, because 79812999 - 2⁴ = 79812983 is a prime.

It is a super-2 number, since 2×79812999² = 12740229618748002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79813999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210957 + ... + 211334.

It is an arithmetic number, because the mean of its divisors is an integer number (8445840).

Almost surely, 2^79812999 is an apocalyptic number.

79812999 is a deficient number, since it is larger than the sum of its proper divisors (55320441).

79812999 is a wasteful number, since it uses less digits than its factorization.

79812999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422307 (or 422301 counting only the distinct ones).

The product of its digits is 734832, while the sum is 54.

The square root of 79812999 is about 8933.8121202542. The cubic root of 79812999 is about 430.5509415370.

The spelling of 79812999 in words is "seventy-nine million, eight hundred twelve thousand, nine hundred ninety-nine".