79091713 has 2 divisors, whose sum is σ = 79091714. Its totient is φ = 79091712.

The previous prime is 79091711. The next prime is 79091717. The reversal of 79091713 is 31719097.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78287104 + 804609 = 8848^2 + 897^2 .

It is a cyclic number.

It is not a de Polignac number, because 79091713 - 2¹ = 79091711 is a prime.

Together with 79091711, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (79091711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39545856 + 39545857.

It is an arithmetic number, because the mean of its divisors is an integer number (39545857).

Almost surely, 2^79091713 is an apocalyptic number.

It is an amenable number.

79091713 is a deficient number, since it is larger than the sum of its proper divisors (1).

79091713 is an equidigital number, since it uses as much as digits as its factorization.

79091713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11907, while the sum is 37.

The square root of 79091713 is about 8893.3521801399. The cubic root of 79091713 is about 429.2500231506.

The spelling of 79091713 in words is "seventy-nine million, ninety-one thousand, seven hundred thirteen".