3937971 has 4 divisors (see below), whose sum is σ = 5250632. Its totient is φ = 2625312.

The previous prime is 3937951. The next prime is 3937981. The reversal of 3937971 is 1797393.

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

It is a de Polignac number, because none of the positive numbers 2^k-3937971 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3937951) 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, 656326 + ... + 656331.

It is an arithmetic number, because the mean of its divisors is an integer number (1312658).

Almost surely, 2^3937971 is an apocalyptic number.

3937971 is a deficient number, since it is larger than the sum of its proper divisors (1312661).

3937971 is a wasteful number, since it uses less digits than its factorization.

3937971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312660.

The product of its digits is 35721, while the sum is 39.

The square root of 3937971 is about 1984.4321605941. The cubic root of 3937971 is about 157.9152859980.

The spelling of 3937971 in words is "three million, nine hundred thirty-seven thousand, nine hundred seventy-one".