3687399 has 6 divisors (see below), whose sum is σ = 5326256. Its totient is φ = 2458260.

The previous prime is 3687391. The next prime is 3687401. The reversal of 3687399 is 9937863.

It is a happy number.

It is not a de Polignac number, because 3687399 - 2³ = 3687391 is a prime.

It is a super-2 number, since 2×3687399² = 27193822770402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3687391) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 204847 + ... + 204864.

Almost surely, 2^3687399 is an apocalyptic number.

3687399 is a deficient number, since it is larger than the sum of its proper divisors (1638857).

3687399 is a wasteful number, since it uses less digits than its factorization.

3687399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409717 (or 409714 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 3687399 is about 1920.2601386271. The cubic root of 3687399 is about 154.4922546153.

The spelling of 3687399 in words is "three million, six hundred eighty-seven thousand, three hundred ninety-nine".