79591129 has 2 divisors, whose sum is σ = 79591130. Its totient is φ = 79591128.

The previous prime is 79591123. The next prime is 79591147. The reversal of 79591129 is 92119597.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73960000 + 5631129 = 8600^2 + 2373^2 .

It is a cyclic number.

It is not a de Polignac number, because 79591129 - 2³ = 79591121 is a prime.

It is not a weakly prime, because it can be changed into another prime (79591121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39795564 + 39795565.

It is an arithmetic number, because the mean of its divisors is an integer number (39795565).

Almost surely, 2^79591129 is an apocalyptic number.

It is an amenable number.

79591129 is a deficient number, since it is larger than the sum of its proper divisors (1).

79591129 is an equidigital number, since it uses as much as digits as its factorization.

79591129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51030, while the sum is 43.

The square root of 79591129 is about 8921.3860470221. The cubic root of 79591129 is about 430.1516123025.

The spelling of 79591129 in words is "seventy-nine million, five hundred ninety-one thousand, one hundred twenty-nine".