3957987 has 32 divisors (see below), whose sum is σ = 6137856. Its totient is φ = 2246400.

The previous prime is 3957983. The next prime is 3958013. The reversal of 3957987 is 7897593.

It is not a de Polignac number, because 3957987 - 2² = 3957983 is a prime.

It is a super-2 number, since 2×3957987² = 31331322184338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3957983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54183 + ... + 54255.

It is an arithmetic number, because the mean of its divisors is an integer number (191808).

Almost surely, 2^3957987 is an apocalyptic number.

3957987 is a deficient number, since it is larger than the sum of its proper divisors (2179869).

3957987 is a wasteful number, since it uses less digits than its factorization.

3957987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171.

The product of its digits is 476280, while the sum is 48.

The square root of 3957987 is about 1989.4690246395. The cubic root of 3957987 is about 158.1823856560.

The spelling of 3957987 in words is "three million, nine hundred fifty-seven thousand, nine hundred eighty-seven".