79930999 has 4 divisors (see below), whose sum is σ = 79951936. Its totient is φ = 79910064.

The previous prime is 79930997. The next prime is 79931011. The reversal of 79930999 is 99903997.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79930999 - 2¹ = 79930997 is a prime.

It is a super-2 number, since 2×79930999² = 12777929202276002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79930997) 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, 2934 + ... + 12979.

It is an arithmetic number, because the mean of its divisors is an integer number (19987984).

Almost surely, 2^79930999 is an apocalyptic number.

79930999 is a deficient number, since it is larger than the sum of its proper divisors (20937).

79930999 is a wasteful number, since it uses less digits than its factorization.

79930999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20936.

The product of its (nonzero) digits is 1240029, while the sum is 55.

The square root of 79930999 is about 8940.4138047408. The cubic root of 79930999 is about 430.7630205827.

The spelling of 79930999 in words is "seventy-nine million, nine hundred thirty thousand, nine hundred ninety-nine".