79372129 has 2 divisors, whose sum is σ = 79372130. Its totient is φ = 79372128.

The previous prime is 79372123. The next prime is 79372171. The reversal of 79372129 is 92127397.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52591504 + 26780625 = 7252^2 + 5175^2 .

It is a cyclic number.

It is not a de Polignac number, because 79372129 - 2¹⁵ = 79339361 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 79372091 and 79372100.

It is not a weakly prime, because it can be changed into another prime (79372123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39686064 + 39686065.

It is an arithmetic number, because the mean of its divisors is an integer number (39686065).

Almost surely, 2^79372129 is an apocalyptic number.

It is an amenable number.

79372129 is a deficient number, since it is larger than the sum of its proper divisors (1).

79372129 is an equidigital number, since it uses as much as digits as its factorization.

79372129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628, while the sum is 40.

The square root of 79372129 is about 8909.1037147403. The cubic root of 79372129 is about 429.7567201472.

The spelling of 79372129 in words is "seventy-nine million, three hundred seventy-two thousand, one hundred twenty-nine".