3986740631 has 2 divisors, whose sum is σ = 3986740632. Its totient is φ = 3986740630.

The previous prime is 3986740603. The next prime is 3986740633. The reversal of 3986740631 is 1360476893.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3986740631 - 2²⁶ = 3919631767 is a prime.

It is a super-2 number, since 2×3986740631² = 31788201717732556322, which contains 22 as substring.

Together with 3986740633, 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 (3986740633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1993370315 + 1993370316.

It is an arithmetic number, because the mean of its divisors is an integer number (1993370316).

Almost surely, 2^3986740631 is an apocalyptic number.

3986740631 is a deficient number, since it is larger than the sum of its proper divisors (1).

3986740631 is an equidigital number, since it uses as much as digits as its factorization.

3986740631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 47.

The square root of 3986740631 is about 63140.6416739646. The cubic root of 3986740631 is about 1585.6451156277.

The spelling of 3986740631 in words is "three billion, nine hundred eighty-six million, seven hundred forty thousand, six hundred thirty-one".