90455717 has 16 divisors (see below), whose sum is σ = 101775744. Its totient is φ = 79680000.

The previous prime is 90455699. The next prime is 90455719. The reversal of 90455717 is 71755409.

It is a cyclic number.

It is not a de Polignac number, because 90455717 - 2⁶ = 90455653 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 (90455719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74717 + ... + 75917.

It is an arithmetic number, because the mean of its divisors is an integer number (6360984).

Almost surely, 2^90455717 is an apocalyptic number.

It is an amenable number.

90455717 is a deficient number, since it is larger than the sum of its proper divisors (11320027).

90455717 is a wasteful number, since it uses less digits than its factorization.

90455717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420.

The product of its (nonzero) digits is 44100, while the sum is 38.

The square root of 90455717 is about 9510.8210476278. The cubic root of 90455717 is about 448.8955913202.

The spelling of 90455717 in words is "ninety million, four hundred fifty-five thousand, seven hundred seventeen".