3931331 has 2 divisors, whose sum is σ = 3931332. Its totient is φ = 3931330.

The previous prime is 3931307. The next prime is 3931349. The reversal of 3931331 is 1331393.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3931331 - 2¹⁰ = 3930307 is a prime.

It is a super-2 number, since 2×3931331² = 30910726863122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3931297 and 3931306.

It is not a weakly prime, because it can be changed into another prime (3931231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1965665 + 1965666.

It is an arithmetic number, because the mean of its divisors is an integer number (1965666).

Almost surely, 2^3931331 is an apocalyptic number.

3931331 is a deficient number, since it is larger than the sum of its proper divisors (1).

3931331 is an equidigital number, since it uses as much as digits as its factorization.

3931331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 729, while the sum is 23.

The square root of 3931331 is about 1982.7584320839. The cubic root of 3931331 is about 157.8264799105.

The spelling of 3931331 in words is "three million, nine hundred thirty-one thousand, three hundred thirty-one".