90302409 has 12 divisors (see below), whose sum is σ = 130603200. Its totient is φ = 60124824.

The previous prime is 90302371. The next prime is 90302413. The reversal of 90302409 is 90420309.

It is not a de Polignac number, because 90302409 - 2¹¹ = 90300361 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90302479) 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, 1572 + ... + 13530.

It is an arithmetic number, because the mean of its divisors is an integer number (10883600).

Almost surely, 2^90302409 is an apocalyptic number.

It is an amenable number.

90302409 is a deficient number, since it is larger than the sum of its proper divisors (40300791).

90302409 is a wasteful number, since it uses less digits than its factorization.

90302409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12804 (or 12801 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 90302409 is about 9502.7579680848. The cubic root of 90302409 is about 448.6418457916.

The spelling of 90302409 in words is "ninety million, three hundred two thousand, four hundred nine".