90257317 has 4 divisors (see below), whose sum is σ = 90281356. Its totient is φ = 90233280.

The previous prime is 90257311. The next prime is 90257327. The reversal of 90257317 is 71375209.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38862756 + 51394561 = 6234^2 + 7169^2 .

It is a cyclic number.

It is not a de Polignac number, because 90257317 - 2¹⁵ = 90224549 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 (90257311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5034 + ... + 14347.

It is an arithmetic number, because the mean of its divisors is an integer number (22570339).

Almost surely, 2^90257317 is an apocalyptic number.

It is an amenable number.

90257317 is a deficient number, since it is larger than the sum of its proper divisors (24039).

90257317 is a wasteful number, since it uses less digits than its factorization.

90257317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24038.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 90257317 is about 9500.3850974579. The cubic root of 90257317 is about 448.5671577644.

The spelling of 90257317 in words is "ninety million, two hundred fifty-seven thousand, three hundred seventeen".