90764726917 has 2 divisors, whose sum is σ = 90764726918. Its totient is φ = 90764726916.

The previous prime is 90764726893. The next prime is 90764726993. The reversal of 90764726917 is 71962746709.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90207719716 + 557007201 = 300346^2 + 23601^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90764726917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90764826917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45382363458 + 45382363459.

It is an arithmetic number, because the mean of its divisors is an integer number (45382363459).

Almost surely, 2^90764726917 is an apocalyptic number.

It is an amenable number.

90764726917 is a deficient number, since it is larger than the sum of its proper divisors (1).

90764726917 is an equidigital number, since it uses as much as digits as its factorization.

90764726917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8001504, while the sum is 58.

The spelling of 90764726917 in words is "ninety billion, seven hundred sixty-four million, seven hundred twenty-six thousand, nine hundred seventeen".