900031690 has 36 divisors (see below), whose sum is σ = 1660477014. Its totient is φ = 351246688.

The previous prime is 900031679. The next prime is 900031709. The reversal of 900031690 is 96130009.

It is a happy number.

900031690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 851297329 + 48734361 = 29177^2 + 6981^2 .

It is a super-2 number, since 2×900031690² = 1620114086008512200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5028021 + ... + 5028199.

Almost surely, 2^900031690 is an apocalyptic number.

900031690 is a deficient number, since it is larger than the sum of its proper divisors (760445324).

900031690 is an equidigital number, since it uses as much as digits as its factorization.

900031690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 900031690 is about 30000.5281620174. The cubic root of 900031690 is about 965.5007164573.

Adding to 900031690 its reverse (96130009), we get a palindrome (996161699).

The spelling of 900031690 in words is "nine hundred million, thirty-one thousand, six hundred ninety".