203268989 has 16 divisors (see below), whose sum is σ = 255532416. Its totient is φ = 158384160.

The previous prime is 203268943. The next prime is 203269007. The reversal of 203268989 is 989862302.

It is not a de Polignac number, because 203268989 - 2¹⁶ = 203203453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203268389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1592 + ... + 20225.

It is an arithmetic number, because the mean of its divisors is an integer number (15970776).

Almost surely, 2^203268989 is an apocalyptic number.

It is an amenable number.

203268989 is a deficient number, since it is larger than the sum of its proper divisors (52263427).

203268989 is an equidigital number, since it uses as much as digits as its factorization.

203268989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21857 (or 21835 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 203268989 is about 14257.2433871348. The cubic root of 203268989 is about 587.9725381300.

The spelling of 203268989 in words is "two hundred three million, two hundred sixty-eight thousand, nine hundred eighty-nine".