3997717 has 4 divisors (see below), whose sum is σ = 4003756. Its totient is φ = 3991680.

The previous prime is 3997673. The next prime is 3997723. The reversal of 3997717 is 7177993.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1418481 + 2579236 = 1191^2 + 1606^2 .

It is a cyclic number.

It is not a de Polignac number, because 3997717 - 2¹⁵ = 3964949 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 (3997117) 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, 1884 + ... + 3397.

It is an arithmetic number, because the mean of its divisors is an integer number (1000939).

Almost surely, 2^3997717 is an apocalyptic number.

It is an amenable number.

3997717 is a deficient number, since it is larger than the sum of its proper divisors (6039).

3997717 is an equidigital number, since it uses as much as digits as its factorization.

3997717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6038.

The product of its digits is 83349, while the sum is 43.

The square root of 3997717 is about 1999.4291685379. The cubic root of 3997717 is about 158.7098991444.

The spelling of 3997717 in words is "three million, nine hundred ninety-seven thousand, seven hundred seventeen".