79647017 has 2 divisors, whose sum is σ = 79647018. Its totient is φ = 79647016.

The previous prime is 79647013. The next prime is 79647041. The reversal of 79647017 is 71074697.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65351056 + 14295961 = 8084^2 + 3781^2 .

It is an emirp because it is prime and its reverse (71074697) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79647017 - 2² = 79647013 is a prime.

It is not a weakly prime, because it can be changed into another prime (79647011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39823508 + 39823509.

It is an arithmetic number, because the mean of its divisors is an integer number (39823509).

Almost surely, 2^79647017 is an apocalyptic number.

It is an amenable number.

79647017 is a deficient number, since it is larger than the sum of its proper divisors (1).

79647017 is an equidigital number, since it uses as much as digits as its factorization.

79647017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 74088, while the sum is 41.

The square root of 79647017 is about 8924.5177460746. The cubic root of 79647017 is about 430.2522712949.

The spelling of 79647017 in words is "seventy-nine million, six hundred forty-seven thousand, seventeen".