3981706331 has 2 divisors, whose sum is σ = 3981706332. Its totient is φ = 3981706330.

The previous prime is 3981706283. The next prime is 3981706373. The reversal of 3981706331 is 1336071893.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3981706331 is a prime.

It is a super-2 number, since 2×3981706331² = 31707970612650963122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3981706031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1990853165 + 1990853166.

It is an arithmetic number, because the mean of its divisors is an integer number (1990853166).

Almost surely, 2^3981706331 is an apocalyptic number.

3981706331 is a deficient number, since it is larger than the sum of its proper divisors (1).

3981706331 is an equidigital number, since it uses as much as digits as its factorization.

3981706331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 3981706331 is about 63100.7633155099. The cubic root of 3981706331 is about 1584.9774043026.

The spelling of 3981706331 in words is "three billion, nine hundred eighty-one million, seven hundred six thousand, three hundred thirty-one".