3986331731 has 4 divisors (see below), whose sum is σ = 4025800464. Its totient is φ = 3946863000.

The previous prime is 3986331697. The next prime is 3986331781. The reversal of 3986331731 is 1371336893.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3986331731 - 2¹⁰ = 3986330707 is a prime.

It is a super-2 number, since 2×3986331731² = 31781681339154912722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3986331781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19734215 + ... + 19734416.

It is an arithmetic number, because the mean of its divisors is an integer number (1006450116).

Almost surely, 2^3986331731 is an apocalyptic number.

3986331731 is a deficient number, since it is larger than the sum of its proper divisors (39468733).

3986331731 is a wasteful number, since it uses less digits than its factorization.

3986331731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39468732.

The product of its digits is 244944, while the sum is 44.

The square root of 3986331731 is about 63137.4035813954. The cubic root of 3986331731 is about 1585.5909032175.

The spelling of 3986331731 in words is "three billion, nine hundred eighty-six million, three hundred thirty-one thousand, seven hundred thirty-one".