79717867 has 2 divisors, whose sum is σ = 79717868. Its totient is φ = 79717866.

The previous prime is 79717843. The next prime is 79717871. The reversal of 79717867 is 76871797.

It is a strong prime.

It is an emirp because it is prime and its reverse (76871797) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79717867 - 2²³ = 71329259 is a prime.

It is not a weakly prime, because it can be changed into another prime (79717837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39858933 + 39858934.

It is an arithmetic number, because the mean of its divisors is an integer number (39858934).

Almost surely, 2^79717867 is an apocalyptic number.

79717867 is a deficient number, since it is larger than the sum of its proper divisors (1).

79717867 is an equidigital number, since it uses as much as digits as its factorization.

79717867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1037232, while the sum is 52.

The square root of 79717867 is about 8928.4862658796. The cubic root of 79717867 is about 430.3798104471.

The spelling of 79717867 in words is "seventy-nine million, seven hundred seventeen thousand, eight hundred sixty-seven".