90911317 has 12 divisors (see below), whose sum is σ = 109402380. Its totient is φ = 75235776.

The previous prime is 90911287. The next prime is 90911323. The reversal of 90911317 is 71311909.

It can be written as a sum of positive squares in 2 ways, for example, as 48804196 + 42107121 = 6986^2 + 6489^2 .

It is a de Polignac number, because none of the positive numbers 2^k-90911317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90911347) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30568 + ... + 33409.

It is an arithmetic number, because the mean of its divisors is an integer number (9116865).

Almost surely, 2^90911317 is an apocalyptic number.

It is an amenable number.

90911317 is a deficient number, since it is larger than the sum of its proper divisors (18491063).

90911317 is a wasteful number, since it uses less digits than its factorization.

90911317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64020 (or 64013 counting only the distinct ones).

The product of its (nonzero) digits is 1701, while the sum is 31.

The square root of 90911317 is about 9534.7426289334. The cubic root of 90911317 is about 449.6479831394.

The spelling of 90911317 in words is "ninety million, nine hundred eleven thousand, three hundred seventeen".