90087717 has 16 divisors (see below), whose sum is σ = 124750080. Its totient is φ = 57758400.

The previous prime is 90087703. The next prime is 90087727. The reversal of 90087717 is 71778009.

It is a happy number.

It is not a de Polignac number, because 90087717 - 2⁶ = 90087653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90087727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21667 + ... + 25487.

It is an arithmetic number, because the mean of its divisors is an integer number (7796880).

Almost surely, 2^90087717 is an apocalyptic number.

It is an amenable number.

90087717 is a deficient number, since it is larger than the sum of its proper divisors (34662363).

90087717 is a wasteful number, since it uses less digits than its factorization.

90087717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4124.

The product of its (nonzero) digits is 24696, while the sum is 39.

The square root of 90087717 is about 9491.4549464242. The cubic root of 90087717 is about 448.2860182636.

The spelling of 90087717 in words is "ninety million, eighty-seven thousand, seven hundred seventeen".