3689987 has 8 divisors (see below), whose sum is σ = 4246272. Its totient is φ = 3141000.

The previous prime is 3689963. The next prime is 3689993. The reversal of 3689987 is 7899863.

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 3689987 - 2¹⁰ = 3688963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3689927) 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, 689 + ... + 2802.

It is an arithmetic number, because the mean of its divisors is an integer number (530784).

Almost surely, 2^3689987 is an apocalyptic number.

3689987 is a deficient number, since it is larger than the sum of its proper divisors (556285).

3689987 is a wasteful number, since it uses less digits than its factorization.

3689987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3649.

The product of its digits is 653184, while the sum is 50.

The square root of 3689987 is about 1920.9338874620. The cubic root of 3689987 is about 154.5283896120.

The spelling of 3689987 in words is "three million, six hundred eighty-nine thousand, nine hundred eighty-seven".