3951997 has 12 divisors (see below), whose sum is σ = 4678560. Its totient is φ = 3327576.

The previous prime is 3951989. The next prime is 3952009. The reversal of 3951997 is 7991593.

It is not a de Polignac number, because 3951997 - 2³ = 3951989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3951907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2208 + ... + 3574.

It is an arithmetic number, because the mean of its divisors is an integer number (389880).

Almost surely, 2^3951997 is an apocalyptic number.

It is an amenable number.

3951997 is a deficient number, since it is larger than the sum of its proper divisors (726563).

3951997 is a wasteful number, since it uses less digits than its factorization.

3951997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440 (or 1433 counting only the distinct ones).

The product of its digits is 76545, while the sum is 43.

The square root of 3951997 is about 1987.9630278252. The cubic root of 3951997 is about 158.1025478597.

The spelling of 3951997 in words is "three million, nine hundred fifty-one thousand, nine hundred ninety-seven".