3972717 has 12 divisors (see below), whose sum is σ = 6558240. Its totient is φ = 2270088.

The previous prime is 3972697. The next prime is 3972737. The reversal of 3972717 is 7172793.

It is an interprime number because it is at equal distance from previous prime (3972697) and next prime (3972737).

It is a de Polignac number, because none of the positive numbers 2^k-3972717 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3972737) 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, 31467 + ... + 31592.

It is an arithmetic number, because the mean of its divisors is an integer number (546520).

Almost surely, 2^3972717 is an apocalyptic number.

It is an amenable number.

3972717 is a deficient number, since it is larger than the sum of its proper divisors (2585523).

3972717 is a wasteful number, since it uses less digits than its factorization.

3972717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63072 (or 63069 counting only the distinct ones).

The product of its digits is 18522, while the sum is 36.

The square root of 3972717 is about 1993.1675795076. The cubic root of 3972717 is about 158.3783726594.

The spelling of 3972717 in words is "three million, nine hundred seventy-two thousand, seven hundred seventeen".