3975997 has 4 divisors (see below), whose sum is σ = 4185280. Its totient is φ = 3766716.

The previous prime is 3975971. The next prime is 3976001. The reversal of 3975997 is 7995793.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3975997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3975997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3975947) 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, 104613 + ... + 104650.

It is an arithmetic number, because the mean of its divisors is an integer number (1046320).

Almost surely, 2^3975997 is an apocalyptic number.

It is an amenable number.

3975997 is a deficient number, since it is larger than the sum of its proper divisors (209283).

3975997 is a wasteful number, since it uses less digits than its factorization.

3975997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209282.

The product of its digits is 535815, while the sum is 49.

The square root of 3975997 is about 1993.9902206380. The cubic root of 3975997 is about 158.4219480564.

The spelling of 3975997 in words is "three million, nine hundred seventy-five thousand, nine hundred ninety-seven".