90608065 has 4 divisors (see below), whose sum is σ = 108729684. Its totient is φ = 72486448.

The previous prime is 90608027. The next prime is 90608081. The reversal of 90608065 is 56080609.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11451456 + 79156609 = 3384^2 + 8897^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90608065 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90608065.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9060802 + ... + 9060811.

It is an arithmetic number, because the mean of its divisors is an integer number (27182421).

Almost surely, 2^90608065 is an apocalyptic number.

It is an amenable number.

90608065 is a deficient number, since it is larger than the sum of its proper divisors (18121619).

90608065 is a wasteful number, since it uses less digits than its factorization.

90608065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18121618.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 90608065 is about 9518.8268709962. The cubic root of 90608065 is about 449.1474640592.

The spelling of 90608065 in words is "ninety million, six hundred eight thousand, sixty-five".