3931889 has 8 divisors (see below), whose sum is σ = 4264512. Its totient is φ = 3603600.

The previous prime is 3931861. The next prime is 3931891. The reversal of 3931889 is 9881393.

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

It is not a de Polignac number, because 3931889 - 2²⁰ = 2883313 is a prime.

It is a super-2 number, since 2×3931889² = 30919502216642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3931589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 962 + ... + 2964.

It is an arithmetic number, because the mean of its divisors is an integer number (533064).

Almost surely, 2^3931889 is an apocalyptic number.

It is an amenable number.

3931889 is a deficient number, since it is larger than the sum of its proper divisors (332623).

3931889 is a wasteful number, since it uses less digits than its factorization.

3931889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2167.

The product of its digits is 46656, while the sum is 41.

The square root of 3931889 is about 1982.8991401481. The cubic root of 3931889 is about 157.8339466784.

The spelling of 3931889 in words is "three million, nine hundred thirty-one thousand, eight hundred eighty-nine".