90612909 has 12 divisors (see below), whose sum is σ = 131164800. Its totient is φ = 60279624.

The previous prime is 90612901. The next prime is 90612913. The reversal of 90612909 is 90921609.

It is not a de Polignac number, because 90612909 - 2³ = 90612901 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90612901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6199 + ... + 14820.

It is an arithmetic number, because the mean of its divisors is an integer number (10930400).

Almost surely, 2^90612909 is an apocalyptic number.

It is an amenable number.

90612909 is a deficient number, since it is larger than the sum of its proper divisors (40551891).

90612909 is a wasteful number, since it uses less digits than its factorization.

90612909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21504 (or 21501 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 90612909 is about 9519.0813107148. The cubic root of 90612909 is about 449.1554678778.

The spelling of 90612909 in words is "ninety million, six hundred twelve thousand, nine hundred nine".