203972989 has 8 divisors (see below), whose sum is σ = 225650880. Its totient is φ = 182817600.

The previous prime is 203972983. The next prime is 203973013. The reversal of 203972989 is 989279302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 203972989 - 2³ = 203972981 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 (203972981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129804 + ... + 131365.

It is an arithmetic number, because the mean of its divisors is an integer number (28206360).

Almost surely, 2^203972989 is an apocalyptic number.

It is an amenable number.

203972989 is a deficient number, since it is larger than the sum of its proper divisors (21677891).

203972989 is a wasteful number, since it uses less digits than its factorization.

203972989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261251.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 203972989 is about 14281.9112516498. The cubic root of 203972989 is about 588.6505489373.

The spelling of 203972989 in words is "two hundred three million, nine hundred seventy-two thousand, nine hundred eighty-nine".