905991233 has 12 divisors (see below), whose sum is σ = 1090251540. Its totient is φ = 749784672.

The previous prime is 905991187. The next prime is 905991257. The reversal of 905991233 is 332199509.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 563445169 + 342546064 = 23737^2 + 18508^2 .

It is not a de Polignac number, because 905991233 - 2⁸ = 905990977 is a prime.

It is a super-2 number, since 2×905991233² = 1641640228545720578, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (905991283) 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, 317366 + ... + 320207.

It is an arithmetic number, because the mean of its divisors is an integer number (90854295).

Almost surely, 2^905991233 is an apocalyptic number.

It is an amenable number.

905991233 is a deficient number, since it is larger than the sum of its proper divisors (184260307).

905991233 is a wasteful number, since it uses less digits than its factorization.

905991233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637616 (or 637609 counting only the distinct ones).

The product of its (nonzero) digits is 65610, while the sum is 41.

The square root of 905991233 is about 30099.6882541996. The cubic root of 905991233 is about 967.6270451696.

The spelling of 905991233 in words is "nine hundred five million, nine hundred ninety-one thousand, two hundred thirty-three".