79293456917 has 2 divisors, whose sum is σ = 79293456918. Its totient is φ = 79293456916.

The previous prime is 79293456889. The next prime is 79293457003. The reversal of 79293456917 is 71965439297.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64332742321 + 14960714596 = 253639^2 + 122314^2 .

It is a cyclic number.

It is not a de Polignac number, because 79293456917 - 2⁸ = 79293456661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79293456917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79293446917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39646728458 + 39646728459.

It is an arithmetic number, because the mean of its divisors is an integer number (39646728459).

Almost surely, 2^79293456917 is an apocalyptic number.

It is an amenable number.

79293456917 is a deficient number, since it is larger than the sum of its proper divisors (1).

79293456917 is an equidigital number, since it uses as much as digits as its factorization.

79293456917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25719120, while the sum is 62.

The spelling of 79293456917 in words is "seventy-nine billion, two hundred ninety-three million, four hundred fifty-six thousand, nine hundred seventeen".