900398631 has 24 divisors (see below), whose sum is σ = 1330051072. Its totient is φ = 541371600.

The previous prime is 900398621. The next prime is 900398633. The reversal of 900398631 is 136893009.

It is not a de Polignac number, because 900398631 - 2¹⁹ = 899874343 is a prime.

It is a super-2 number, since 2×900398631² = 1621435389413348322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 900398631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (900398633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36336 + ... + 55866.

Almost surely, 2^900398631 is an apocalyptic number.

900398631 is a deficient number, since it is larger than the sum of its proper divisors (429652441).

900398631 is a wasteful number, since it uses less digits than its factorization.

900398631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19683 (or 19672 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 900398631 is about 30006.6431144838. The cubic root of 900398631 is about 965.6319094907.

The spelling of 900398631 in words is "nine hundred million, three hundred ninety-eight thousand, six hundred thirty-one".