90910091017 has 2 divisors, whose sum is σ = 90910091018. Its totient is φ = 90910091016.

The previous prime is 90910091003. The next prime is 90910091039. The reversal of 90910091017 is 71019001909.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82766111481 + 8143979536 = 287691^2 + 90244^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90910091017 is a prime.

It is not a weakly prime, because it can be changed into another prime (90910091047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45455045508 + 45455045509.

It is an arithmetic number, because the mean of its divisors is an integer number (45455045509).

Almost surely, 2^90910091017 is an apocalyptic number.

It is an amenable number.

90910091017 is a deficient number, since it is larger than the sum of its proper divisors (1).

90910091017 is an equidigital number, since it uses as much as digits as its factorization.

90910091017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5103, while the sum is 37.

The spelling of 90910091017 in words is "ninety billion, nine hundred ten million, ninety-one thousand, seventeen".