79902231 has 4 divisors (see below), whose sum is σ = 106536312. Its totient is φ = 53268152.

The previous prime is 79902181. The next prime is 79902233. The reversal of 79902231 is 13220997.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13220997 = 3 ⋅4406999.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79902231 is a prime.

It is a super-2 number, since 2×79902231² = 12768733037554722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 79902192 and 79902201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79902233) 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 3 ways as a sum of consecutive naturals, for example, 13317036 + ... + 13317041.

It is an arithmetic number, because the mean of its divisors is an integer number (26634078).

Almost surely, 2^79902231 is an apocalyptic number.

79902231 is a deficient number, since it is larger than the sum of its proper divisors (26634081).

79902231 is a wasteful number, since it uses less digits than its factorization.

79902231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26634080.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 79902231 is about 8938.8047858760. The cubic root of 79902231 is about 430.7113356807.

The spelling of 79902231 in words is "seventy-nine million, nine hundred two thousand, two hundred thirty-one".