3971671531 has 4 divisors (see below), whose sum is σ = 3972475152. Its totient is φ = 3970867912.

The previous prime is 3971671453. The next prime is 3971671589. The reversal of 3971671531 is 1351761793.

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 3971671531 - 2¹⁵ = 3971638763 is a prime.

It is a super-2 number, since 2×3971671531² = 31548349500311767922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3971671591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394351 + ... + 404296.

It is an arithmetic number, because the mean of its divisors is an integer number (993118788).

Almost surely, 2^3971671531 is an apocalyptic number.

3971671531 is a deficient number, since it is larger than the sum of its proper divisors (803621).

3971671531 is an equidigital number, since it uses as much as digits as its factorization.

3971671531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803620.

The product of its digits is 119070, while the sum is 43.

The square root of 3971671531 is about 63021.1990603162. The cubic root of 3971671531 is about 1583.6447837280.

The spelling of 3971671531 in words is "three billion, nine hundred seventy-one million, six hundred seventy-one thousand, five hundred thirty-one".