79959169 has 2 divisors, whose sum is σ = 79959170. Its totient is φ = 79959168.

The previous prime is 79959157. The next prime is 79959223. The reversal of 79959169 is 96195997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75898944 + 4060225 = 8712^2 + 2015^2 .

It is a cyclic number.

It is not a de Polignac number, because 79959169 - 2¹⁹ = 79434881 is a prime.

It is a super-2 number, since 2×79959169² = 12786937414341122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79959149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39979584 + 39979585.

It is an arithmetic number, because the mean of its divisors is an integer number (39979585).

Almost surely, 2^79959169 is an apocalyptic number.

It is an amenable number.

79959169 is a deficient number, since it is larger than the sum of its proper divisors (1).

79959169 is an equidigital number, since it uses as much as digits as its factorization.

79959169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1377810, while the sum is 55.

The square root of 79959169 is about 8941.9890963924. The cubic root of 79959169 is about 430.8136190956.

The spelling of 79959169 in words is "seventy-nine million, nine hundred fifty-nine thousand, one hundred sixty-nine".