3956831 has 2 divisors, whose sum is σ = 3956832. Its totient is φ = 3956830.

The previous prime is 3956803. The next prime is 3956833. The reversal of 3956831 is 1386593.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3956831 is a prime.

It is a super-2 number, since 2×3956831² = 31313023125122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 3956833, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 3956791 and 3956800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3956833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1978415 + 1978416.

It is an arithmetic number, because the mean of its divisors is an integer number (1978416).

Almost surely, 2^3956831 is an apocalyptic number.

3956831 is a deficient number, since it is larger than the sum of its proper divisors (1).

3956831 is an equidigital number, since it uses as much as digits as its factorization.

3956831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 35.

The square root of 3956831 is about 1989.1784736418. The cubic root of 3956831 is about 158.1669841701.

The spelling of 3956831 in words is "three million, nine hundred fifty-six thousand, eight hundred thirty-one".