3931139 has 8 divisors (see below), whose sum is σ = 4066608. Its totient is φ = 3797280.

The previous prime is 3931093. The next prime is 3931159. The reversal of 3931139 is 9311393.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3931139 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3931159) 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, 6404 + ... + 6990.

It is an arithmetic number, because the mean of its divisors is an integer number (508326).

Almost surely, 2^3931139 is an apocalyptic number.

3931139 is a deficient number, since it is larger than the sum of its proper divisors (135469).

3931139 is a wasteful number, since it uses less digits than its factorization.

3931139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805.

The product of its digits is 2187, while the sum is 29.

The square root of 3931139 is about 1982.7100140969. The cubic root of 3931139 is about 157.8239105366.

The spelling of 3931139 in words is "three million, nine hundred thirty-one thousand, one hundred thirty-nine".