203478989 has 8 divisors (see below), whose sum is σ = 232677120. Its totient is φ = 174313296.

The previous prime is 203478973. The next prime is 203478991. The reversal of 203478989 is 989874302.

It is a happy number.

203478989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 203478989 - 2⁴ = 203478973 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 (203478929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7292 + ... + 21450.

It is an arithmetic number, because the mean of its divisors is an integer number (29084640).

Almost surely, 2^203478989 is an apocalyptic number.

It is an amenable number.

203478989 is a deficient number, since it is larger than the sum of its proper divisors (29198131).

203478989 is a wasteful number, since it uses less digits than its factorization.

203478989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16219.

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 203478989 is about 14264.6061635083. The cubic root of 203478989 is about 588.1749492914.

The spelling of 203478989 in words is "two hundred three million, four hundred seventy-eight thousand, nine hundred eighty-nine".