3913931 has 4 divisors (see below), whose sum is σ = 4473072. Its totient is φ = 3354792.

The previous prime is 3913907. The next prime is 3913963. The reversal of 3913931 is 1393193.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-3913931 is a prime.

It is a super-2 number, since 2×3913931² = 30637711745522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3913894 and 3913903.

It is not an unprimeable number, because it can be changed into a prime (3913991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279560 + ... + 279573.

It is an arithmetic number, because the mean of its divisors is an integer number (1118268).

Almost surely, 2^3913931 is an apocalyptic number.

3913931 is a deficient number, since it is larger than the sum of its proper divisors (559141).

3913931 is an equidigital number, since it uses as much as digits as its factorization.

3913931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559140.

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

The square root of 3913931 is about 1978.3657396953. The cubic root of 3913931 is about 157.5932898231.

The spelling of 3913931 in words is "three million, nine hundred thirteen thousand, nine hundred thirty-one".