79605761 has 2 divisors, whose sum is σ = 79605762. Its totient is φ = 79605760.

The previous prime is 79605739. The next prime is 79605817. The reversal of 79605761 is 16750697.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51036736 + 28569025 = 7144^2 + 5345^2 .

It is an emirp because it is prime and its reverse (16750697) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79605761 is a prime.

It is not a weakly prime, because it can be changed into another prime (79605731) 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, 39802880 + 39802881.

It is an arithmetic number, because the mean of its divisors is an integer number (39802881).

Almost surely, 2^79605761 is an apocalyptic number.

It is an amenable number.

79605761 is a deficient number, since it is larger than the sum of its proper divisors (1).

79605761 is an equidigital number, since it uses as much as digits as its factorization.

79605761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 79605761 is about 8922.2060612833. The cubic root of 79605761 is about 430.1779703184.

The spelling of 79605761 in words is "seventy-nine million, six hundred five thousand, seven hundred sixty-one".