3637989 has 6 divisors (see below), whose sum is σ = 5254886. Its totient is φ = 2425320.

The previous prime is 3637981. The next prime is 3638003. The reversal of 3637989 is 9897363.

It is a happy number.

3637989 is a `hidden beast` number, since 3 + 637 + 9 + 8 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3392964 + 245025 = 1842^2 + 495^2 .

It is not a de Polignac number, because 3637989 - 2³ = 3637981 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 (3637981) 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, 202102 + ... + 202119.

Almost surely, 2^3637989 is an apocalyptic number.

It is an amenable number.

3637989 is a deficient number, since it is larger than the sum of its proper divisors (1616897).

3637989 is a wasteful number, since it uses less digits than its factorization.

3637989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404227 (or 404224 counting only the distinct ones).

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

The square root of 3637989 is about 1907.3513048204. The cubic root of 3637989 is about 153.7990999241.

It can be divided in two parts, 36 and 37989, that added together give a square (38025 = 195²).

The spelling of 3637989 in words is "three million, six hundred thirty-seven thousand, nine hundred eighty-nine".