90302009 has 8 divisors (see below), whose sum is σ = 103262208. Its totient is φ = 77356800.

The previous prime is 90301999. The next prime is 90302033. The reversal of 90302009 is 90020309.

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

It is a cyclic number.

It is not a de Polignac number, because 90302009 - 2²⁴ = 73524793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90302309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16409 + ... + 21209.

It is an arithmetic number, because the mean of its divisors is an integer number (12907776).

Almost surely, 2^90302009 is an apocalyptic number.

It is an amenable number.

90302009 is a deficient number, since it is larger than the sum of its proper divisors (12960199).

90302009 is a wasteful number, since it uses less digits than its factorization.

90302009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7495.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 90302009 is about 9502.7369215400. The cubic root of 90302009 is about 448.6411833618.

The spelling of 90302009 in words is "ninety million, three hundred two thousand, nine".