79646971 has 2 divisors, whose sum is σ = 79646972. Its totient is φ = 79646970.

The previous prime is 79646939. The next prime is 79647011. The reversal of 79646971 is 17964697.

It is a weak prime.

It is an emirp because it is prime and its reverse (17964697) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79646971 - 2⁵ = 79646939 is a prime.

It is not a weakly prime, because it can be changed into another prime (79641971) 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, 39823485 + 39823486.

It is an arithmetic number, because the mean of its divisors is an integer number (39823486).

Almost surely, 2^79646971 is an apocalyptic number.

79646971 is a deficient number, since it is larger than the sum of its proper divisors (1).

79646971 is an equidigital number, since it uses as much as digits as its factorization.

79646971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 49.

The square root of 79646971 is about 8924.5151689041. The cubic root of 79646971 is about 430.2521884644.

The spelling of 79646971 in words is "seventy-nine million, six hundred forty-six thousand, nine hundred seventy-one".