3989931 has 8 divisors (see below), whose sum is σ = 5803584. Its totient is φ = 2418120.

The previous prime is 3989929. The next prime is 3989941. The reversal of 3989931 is 1399893.

It is a happy number.

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

It is not a de Polignac number, because 3989931 - 2¹ = 3989929 is a prime.

It is a super-2 number, since 2×3989931² = 31839098769522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3989941) 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, 60421 + ... + 60486.

It is an arithmetic number, because the mean of its divisors is an integer number (725448).

Almost surely, 2^3989931 is an apocalyptic number.

3989931 is a deficient number, since it is larger than the sum of its proper divisors (1813653).

3989931 is a wasteful number, since it uses less digits than its factorization.

3989931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120921.

The product of its digits is 52488, while the sum is 42.

The square root of 3989931 is about 1997.4811638661. The cubic root of 3989931 is about 158.6067971010.

The spelling of 3989931 in words is "three million, nine hundred eighty-nine thousand, nine hundred thirty-one".