3942931 has 2 divisors, whose sum is σ = 3942932. Its totient is φ = 3942930.

The previous prime is 3942923. The next prime is 3942941. The reversal of 3942931 is 1392493.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3942931 - 2³ = 3942923 is a prime.

It is a super-2 number, since 2×3942931² = 31093409741522, which contains 22 as substring.

3942931 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3942893 and 3942902.

It is not a weakly prime, because it can be changed into another prime (3942941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1971465 + 1971466.

It is an arithmetic number, because the mean of its divisors is an integer number (1971466).

Almost surely, 2^3942931 is an apocalyptic number.

3942931 is a deficient number, since it is larger than the sum of its proper divisors (1).

3942931 is an equidigital number, since it uses as much as digits as its factorization.

3942931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 31.

The square root of 3942931 is about 1985.6814951044. The cubic root of 3942931 is about 157.9815579607.

The spelling of 3942931 in words is "three million, nine hundred forty-two thousand, nine hundred thirty-one".