331189989 has 32 divisors (see below), whose sum is σ = 482678784. Its totient is φ = 200785920.

The previous prime is 331189981. The next prime is 331190023. The reversal of 331189989 is 989981133.

It is a happy number.

It is not a de Polignac number, because 331189989 - 2³ = 331189981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331189981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1288549 + ... + 1288805.

It is an arithmetic number, because the mean of its divisors is an integer number (15083712).

Almost surely, 2^331189989 is an apocalyptic number.

331189989 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

331189989 is a deficient number, since it is larger than the sum of its proper divisors (151488795).

331189989 is a wasteful number, since it uses less digits than its factorization.

331189989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637.

The product of its digits is 419904, while the sum is 51.

The square root of 331189989 is about 18198.6260195653. The cubic root of 331189989 is about 691.8719657152.

The spelling of 331189989 in words is "three hundred thirty-one million, one hundred eighty-nine thousand, nine hundred eighty-nine".