79224137 has 2 divisors, whose sum is σ = 79224138. Its totient is φ = 79224136.

The previous prime is 79224133. The next prime is 79224161. The reversal of 79224137 is 73142297.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41229241 + 37994896 = 6421^2 + 6164^2 .

It is an emirp because it is prime and its reverse (73142297) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79224137 - 2² = 79224133 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 79224097 and 79224106.

It is not a weakly prime, because it can be changed into another prime (79224133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39612068 + 39612069.

It is an arithmetic number, because the mean of its divisors is an integer number (39612069).

Almost surely, 2^79224137 is an apocalyptic number.

It is an amenable number.

79224137 is a deficient number, since it is larger than the sum of its proper divisors (1).

79224137 is an equidigital number, since it uses as much as digits as its factorization.

79224137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 35.

The square root of 79224137 is about 8900.7941780495. The cubic root of 79224137 is about 429.4894553579.

The spelling of 79224137 in words is "seventy-nine million, two hundred twenty-four thousand, one hundred thirty-seven".