79669613 has 2 divisors, whose sum is σ = 79669614. Its totient is φ = 79669612.

The previous prime is 79669609. The next prime is 79669627. The reversal of 79669613 is 31696697.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78889924 + 779689 = 8882^2 + 883^2 .

It is a cyclic number.

It is not a de Polignac number, because 79669613 - 2² = 79669609 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 (79669663) 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, 39834806 + 39834807.

It is an arithmetic number, because the mean of its divisors is an integer number (39834807).

Almost surely, 2^79669613 is an apocalyptic number.

It is an amenable number.

79669613 is a deficient number, since it is larger than the sum of its proper divisors (1).

79669613 is an equidigital number, since it uses as much as digits as its factorization.

79669613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 367416, while the sum is 47.

The square root of 79669613 is about 8925.7836070566. The cubic root of 79669613 is about 430.2929552253.

The spelling of 79669613 in words is "seventy-nine million, six hundred sixty-nine thousand, six hundred thirteen".