79402217 has 4 divisors (see below), whose sum is σ = 79499520. Its totient is φ = 79304916.

The previous prime is 79402207. The next prime is 79402231. The reversal of 79402217 is 71220497.

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 a cyclic number.

It is not a de Polignac number, because 79402217 - 2²⁶ = 12293353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79402207) 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, 47417 + ... + 49062.

It is an arithmetic number, because the mean of its divisors is an integer number (19874880).

Almost surely, 2^79402217 is an apocalyptic number.

It is an amenable number.

79402217 is a deficient number, since it is larger than the sum of its proper divisors (97303).

79402217 is an equidigital number, since it uses as much as digits as its factorization.

79402217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97302.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 79402217 is about 8910.7921645609. The cubic root of 79402217 is about 429.8110166482.

The spelling of 79402217 in words is "seventy-nine million, four hundred two thousand, two hundred seventeen".