83718927618917 has 2 divisors, whose sum is σ = 83718927618918. Its totient is φ = 83718927618916.

The previous prime is 83718927618901. The next prime is 83718927618959. The reversal of 83718927618917 is 71981672981738.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65544471170116 + 18174456448801 = 8095954^2 + 4263151^2 .

It is a cyclic number.

It is not a de Polignac number, because 83718927618917 - 2⁴ = 83718927618901 is a prime.

It is a super-2 number, since 2×83718927618917² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83718927618317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41859463809458 + 41859463809459.

It is an arithmetic number, because the mean of its divisors is an integer number (41859463809459).

Almost surely, 2^{83718927618917} is an apocalyptic number.

It is an amenable number.

83718927618917 is a deficient number, since it is larger than the sum of its proper divisors (1).

83718927618917 is an equidigital number, since it uses as much as digits as its factorization.

83718927618917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 512096256, while the sum is 77.

The spelling of 83718927618917 in words is "eighty-three trillion, seven hundred eighteen billion, nine hundred twenty-seven million, six hundred eighteen thousand, nine hundred seventeen".