79385261 has 2 divisors, whose sum is σ = 79385262. Its totient is φ = 79385260.

The previous prime is 79385227. The next prime is 79385269. The reversal of 79385261 is 16258397.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40883236 + 38502025 = 6394^2 + 6205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79385261 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79385269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39692630 + 39692631.

It is an arithmetic number, because the mean of its divisors is an integer number (39692631).

Almost surely, 2^79385261 is an apocalyptic number.

It is an amenable number.

79385261 is a deficient number, since it is larger than the sum of its proper divisors (1).

79385261 is an equidigital number, since it uses as much as digits as its factorization.

79385261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 79385261 is about 8909.8406831997. The cubic root of 79385261 is about 429.7804197090.

The spelling of 79385261 in words is "seventy-nine million, three hundred eighty-five thousand, two hundred sixty-one".