900999100 has 18 divisors (see below), whose sum is σ = 1955168264. Its totient is φ = 360399600.

The previous prime is 900999053. The next prime is 900999107. The reversal of 900999100 is 1999009.

It is a self number, because there is not a number n which added to its sum of digits gives 900999100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (900999107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4504896 + ... + 4505095.

Almost surely, 2^900999100 is an apocalyptic number.

It is an amenable number.

900999100 is an abundant number, since it is smaller than the sum of its proper divisors (1054169164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

900999100 is a wasteful number, since it uses less digits than its factorization.

900999100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9010005 (or 9009998 counting only the distinct ones).

The product of its (nonzero) digits is 6561, while the sum is 37.

The square root of 900999100 is about 30016.6470479299. The cubic root of 900999100 is about 965.8465193163.

It can be divided in two parts, 90099 and 9100, that added together give a palindrome (99199).

The spelling of 900999100 in words is "nine hundred million, nine hundred ninety-nine thousand, one hundred".