3997685 has 8 divisors (see below), whose sum is σ = 4808376. Its totient is φ = 3190720.

The previous prime is 3997673. The next prime is 3997723. The reversal of 3997685 is 5867993.

It can be written as a sum of positive squares in 4 ways, for example, as 2540836 + 1456849 = 1594^2 + 1207^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3997685 - 2¹⁴ = 3981301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2795 + ... + 3975.

It is an arithmetic number, because the mean of its divisors is an integer number (601047).

Almost surely, 2^3997685 is an apocalyptic number.

It is an amenable number.

3997685 is a deficient number, since it is larger than the sum of its proper divisors (810691).

3997685 is a wasteful number, since it uses less digits than its factorization.

3997685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1863.

The product of its digits is 408240, while the sum is 47.

The square root of 3997685 is about 1999.4211662379. The cubic root of 3997685 is about 158.7094756752.

The spelling of 3997685 in words is "three million, nine hundred ninety-seven thousand, six hundred eighty-five".