90565994 has 8 divisors (see below), whose sum is σ = 136152900. Its totient is φ = 45181696.

The previous prime is 90565991. The next prime is 90566009. The reversal of 90565994 is 49956509.

It can be written as a sum of positive squares in 2 ways, for example, as 88642225 + 1923769 = 9415^2 + 1387^2 .

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

It is not an unprimeable number, because it can be changed into a prime (90565991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49529 + ... + 51324.

Almost surely, 2^90565994 is an apocalyptic number.

90565994 is a deficient number, since it is larger than the sum of its proper divisors (45586906).

90565994 is a wasteful number, since it uses less digits than its factorization.

90565994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101304.

The product of its (nonzero) digits is 437400, while the sum is 47.

The square root of 90565994 is about 9516.6167307505. The cubic root of 90565994 is about 449.0779374730.

The spelling of 90565994 in words is "ninety million, five hundred sixty-five thousand, nine hundred ninety-four".