90508665 has 32 divisors (see below), whose sum is σ = 156885120. Its totient is φ = 44292096.

The previous prime is 90508651. The next prime is 90508667. The reversal of 90508665 is 56680509.

It is not a de Polignac number, because 90508665 - 2⁸ = 90508409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (90508667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33609 + ... + 36201.

It is an arithmetic number, because the mean of its divisors is an integer number (4902660).

Almost surely, 2^90508665 is an apocalyptic number.

It is an amenable number.

90508665 is a deficient number, since it is larger than the sum of its proper divisors (66376455).

90508665 is a wasteful number, since it uses less digits than its factorization.

90508665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2793.

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 90508665 is about 9513.6042066086. The cubic root of 90508665 is about 448.9831608277.

The spelling of 90508665 in words is "ninety million, five hundred eight thousand, six hundred sixty-five".