3981706031 has 2 divisors, whose sum is σ = 3981706032. Its totient is φ = 3981706030.

The previous prime is 3981705997. The next prime is 3981706033. The reversal of 3981706031 is 1306071893.

3981706031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3981706031 - 2⁶ = 3981705967 is a prime.

It is a super-2 number, since 2×3981706031² = 31707965834603545922, which contains 22 as substring.

Together with 3981706033, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3981706033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1990853015 + 1990853016.

It is an arithmetic number, because the mean of its divisors is an integer number (1990853016).

Almost surely, 2^3981706031 is an apocalyptic number.

3981706031 is a deficient number, since it is larger than the sum of its proper divisors (1).

3981706031 is an equidigital number, since it uses as much as digits as its factorization.

3981706031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 3981706031 is about 63100.7609383595. The cubic root of 3981706031 is about 1584.9773644961.

The spelling of 3981706031 in words is "three billion, nine hundred eighty-one million, seven hundred six thousand, thirty-one".