90717855 has 8 divisors (see below), whose sum is σ = 145148592. Its totient is φ = 48382848.

The previous prime is 90717841. The next prime is 90717857. The reversal of 90717855 is 55871709.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90717855 - 2⁴ = 90717839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90717857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3023914 + ... + 3023943.

It is an arithmetic number, because the mean of its divisors is an integer number (18143574).

Almost surely, 2^90717855 is an apocalyptic number.

90717855 is a deficient number, since it is larger than the sum of its proper divisors (54430737).

90717855 is a wasteful number, since it uses less digits than its factorization.

90717855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6047865.

The product of its (nonzero) digits is 88200, while the sum is 42.

The square root of 90717855 is about 9524.5921172510. The cubic root of 90717855 is about 449.3288018403.

The spelling of 90717855 in words is "ninety million, seven hundred seventeen thousand, eight hundred fifty-five".