3687649 has 8 divisors (see below), whose sum is σ = 4258688. Its totient is φ = 3127680.

The previous prime is 3687631. The next prime is 3687683. The reversal of 3687649 is 9467863.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 3687649 - 2¹³ = 3679457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3687049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2037 + ... + 3394.

It is an arithmetic number, because the mean of its divisors is an integer number (532336).

Almost surely, 2^3687649 is an apocalyptic number.

It is an amenable number.

3687649 is a deficient number, since it is larger than the sum of its proper divisors (571039).

3687649 is an equidigital number, since it uses as much as digits as its factorization.

3687649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5535.

The product of its digits is 217728, while the sum is 43.

The square root of 3687649 is about 1920.3252328707. The cubic root of 3687649 is about 154.4957459824.

The spelling of 3687649 in words is "three million, six hundred eighty-seven thousand, six hundred forty-nine".