79222129 has 4 divisors (see below), whose sum is σ = 90539584. Its totient is φ = 67904676.

The previous prime is 79222109. The next prime is 79222139. The reversal of 79222129 is 92122297.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 79222129 - 2⁹ = 79221617 is a prime.

It is a super-2 number, since 2×79222129² = 12552291446585282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79222094 and 79222103.

It is not an unprimeable number, because it can be changed into a prime (79222109) 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, 5658717 + ... + 5658730.

It is an arithmetic number, because the mean of its divisors is an integer number (22634896).

Almost surely, 2^79222129 is an apocalyptic number.

It is an amenable number.

79222129 is a deficient number, since it is larger than the sum of its proper divisors (11317455).

79222129 is a wasteful number, since it uses less digits than its factorization.

79222129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11317454.

The product of its digits is 9072, while the sum is 34.

The square root of 79222129 is about 8900.6813784114. The cubic root of 79222129 is about 429.4858267411.

The spelling of 79222129 in words is "seventy-nine million, two hundred twenty-two thousand, one hundred twenty-nine".