79122222497 has 2 divisors, whose sum is σ = 79122222498. Its totient is φ = 79122222496.

The previous prime is 79122222349. The next prime is 79122222499. The reversal of 79122222497 is 79422222197.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66896718736 + 12225503761 = 258644^2 + 110569^2 .

It is an emirp because it is prime and its reverse (79422222197) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79122222497 - 2²⁶ = 79055113633 is a prime.

Together with 79122222499, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79122222499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39561111248 + 39561111249.

It is an arithmetic number, because the mean of its divisors is an integer number (39561111249).

Almost surely, 2^79122222497 is an apocalyptic number.

It is an amenable number.

79122222497 is a deficient number, since it is larger than the sum of its proper divisors (1).

79122222497 is an equidigital number, since it uses as much as digits as its factorization.

79122222497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 47.

The spelling of 79122222497 in words is "seventy-nine billion, one hundred twenty-two million, two hundred twenty-two thousand, four hundred ninety-seven".