90574509 has 16 divisors (see below), whose sum is σ = 123488064. Its totient is φ = 59030400.

The previous prime is 90574489. The next prime is 90574513. The reversal of 90574509 is 90547509.

It is a de Polignac number, because none of the positive numbers 2^k-90574509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90574559) 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, 51769 + ... + 53489.

It is an arithmetic number, because the mean of its divisors is an integer number (7718004).

Almost surely, 2^90574509 is an apocalyptic number.

It is an amenable number.

90574509 is a deficient number, since it is larger than the sum of its proper divisors (32913555).

90574509 is a wasteful number, since it uses less digits than its factorization.

90574509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2108.

The product of its (nonzero) digits is 56700, while the sum is 39.

The square root of 90574509 is about 9517.0640956127. The cubic root of 90574509 is about 449.0920111102.

Subtracting from 90574509 its reverse (90547509), we obtain a cube (27000 = 30³).

The spelling of 90574509 in words is "ninety million, five hundred seventy-four thousand, five hundred nine".