79229999 has 4 divisors (see below), whose sum is σ = 81162480. Its totient is φ = 77297520.

The previous prime is 79229971. The next prime is 79230007. The reversal of 79229999 is 99992297.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99992297 = 103 ⋅970799.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79229999 is a prime.

It is a Duffinian number.

79229999 is a modest number, since divided by 9999 gives 7922 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79229929) 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, 966179 + ... + 966260.

It is an arithmetic number, because the mean of its divisors is an integer number (20290620).

Almost surely, 2^79229999 is an apocalyptic number.

79229999 is a deficient number, since it is larger than the sum of its proper divisors (1932481).

79229999 is a wasteful number, since it uses less digits than its factorization.

79229999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1932480.

The product of its digits is 1653372, while the sum is 56.

The square root of 79229999 is about 8901.1234684168. The cubic root of 79229999 is about 429.5000481107.

The spelling of 79229999 in words is "seventy-nine million, two hundred twenty-nine thousand, nine hundred ninety-nine".