79812017 has 2 divisors, whose sum is σ = 79812018. Its totient is φ = 79812016.

The previous prime is 79811981. The next prime is 79812043. The reversal of 79812017 is 71021897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44302336 + 35509681 = 6656^2 + 5959^2 .

It is an emirp because it is prime and its reverse (71021897) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79812017 - 2¹⁴ = 79795633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79812067) 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, 39906008 + 39906009.

It is an arithmetic number, because the mean of its divisors is an integer number (39906009).

Almost surely, 2^79812017 is an apocalyptic number.

It is an amenable number.

79812017 is a deficient number, since it is larger than the sum of its proper divisors (1).

79812017 is an equidigital number, since it uses as much as digits as its factorization.

79812017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 35.

The square root of 79812017 is about 8933.7571603441. The cubic root of 79812017 is about 430.5491757313.

The spelling of 79812017 in words is "seventy-nine million, eight hundred twelve thousand, seventeen".