3931613 has 24 divisors (see below), whose sum is σ = 4979520. Its totient is φ = 3084480.

The previous prime is 3931589. The next prime is 3931639. The reversal of 3931613 is 3161393.

It is not a de Polignac number, because 3931613 - 2⁸ = 3931357 is a prime.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3931693) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38120 + ... + 38222.

It is an arithmetic number, because the mean of its divisors is an integer number (207480).

Almost surely, 2^3931613 is an apocalyptic number.

It is an amenable number.

3931613 is a deficient number, since it is larger than the sum of its proper divisors (1047907).

3931613 is a wasteful number, since it uses less digits than its factorization.

3931613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 170 counting only the distinct ones).

The product of its digits is 1458, while the sum is 26.

The square root of 3931613 is about 1982.8295438590. The cubic root of 3931613 is about 157.8302535267.

The spelling of 3931613 in words is "three million, nine hundred thirty-one thousand, six hundred thirteen".