90633609 has 48 divisors (see below), whose sum is σ = 148674240. Its totient is φ = 52721280.

The previous prime is 90633589. The next prime is 90633643.

90633609 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 90633609 - 2⁵ = 90633577 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 not an unprimeable number, because it can be changed into a prime (90633679) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 399154 + ... + 399380.

It is an arithmetic number, because the mean of its divisors is an integer number (3097380).

Almost surely, 2^90633609 is an apocalyptic number.

90633609 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

It is an amenable number.

90633609 is a deficient number, since it is larger than the sum of its proper divisors (58040631).

90633609 is a wasteful number, since it uses less digits than its factorization.

90633609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390 (or 387 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 36.

The square root of 90633609 is about 9520.1685384241. The cubic root of 90633609 is about 449.1896676049.

The spelling of 90633609 in words is "ninety million, six hundred thirty-three thousand, six hundred nine".