9121900 has 36 divisors (see below), whose sum is σ = 20840680. Its totient is φ = 3456000.

The previous prime is 9121897. The next prime is 9121909. The reversal of 9121900 is 91219.

It is a super-2 number, since 2×9121900² = 166418119220000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9121909) 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, 501 + ... + 4300.

Almost surely, 2^9121900 is an apocalyptic number.

It is an amenable number.

9121900 is an abundant number, since it is smaller than the sum of its proper divisors (11718780).

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

9121900 is a wasteful number, since it uses less digits than its factorization.

9121900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4834 (or 4827 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 9121900 is about 3020.2483341606. The cubic root of 9121900 is about 208.9432933004.

Multiplying 9121900 by its reverse (91219), we get a square (832090596100 = 912190²).

9121900 divided by its reverse (91219) gives a square (100 = 10²).

The spelling of 9121900 in words is "nine million, one hundred twenty-one thousand, nine hundred".