203989900 has 18 divisors (see below), whose sum is σ = 442658300. Its totient is φ = 81595920.

The previous prime is 203989897. The next prime is 203989927. The reversal of 203989900 is 9989302.

It is a happy number.

It is a super-2 number, since 2×203989900² = 83223758604020000, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1019850 + ... + 1020049.

Almost surely, 2^203989900 is an apocalyptic number.

203989900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203989900 is an abundant number, since it is smaller than the sum of its proper divisors (238668400).

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

203989900 is a wasteful number, since it uses less digits than its factorization.

203989900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2039913 (or 2039906 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 203989900 is about 14282.5032819881. The cubic root of 203989900 is about 588.6668164414. Note that the first 3 decimals are identical.

The spelling of 203989900 in words is "two hundred three million, nine hundred eighty-nine thousand, nine hundred".