90917 has 2 divisors, whose sum is σ = 90918. Its totient is φ = 90916.

The previous prime is 90911. The next prime is 90931. The reversal of 90917 is 71909.

90917 is nontrivially palindromic in base 4.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83521 + 7396 = 289^2 + 86^2 .

It is an emirp because it is prime and its reverse (71909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90917 - 2⁴ = 90901 is a prime.

It is a super-3 number, since 3×90917³ = 2254532733375639, which contains 333 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 90917.

It is not a weakly prime, because it can be changed into another prime (90911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45458 + 45459.

It is an arithmetic number, because the mean of its divisors is an integer number (45459).

2⁹⁰⁹¹⁷ is an apocalyptic number.

It is an amenable number.

90917 is a deficient number, since it is larger than the sum of its proper divisors (1).

90917 is an equidigital number, since it uses as much as digits as its factorization.

90917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 567, while the sum is 26.

The square root of 90917 is about 301.5244600360. The cubic root of 90917 is about 44.9657352330.

The spelling of 90917 in words is "ninety thousand, nine hundred seventeen".