3633987 has 24 divisors (see below), whose sum is σ = 5745600. Its totient is φ = 2036496.

The previous prime is 3633983. The next prime is 3633991. The reversal of 3633987 is 7893363.

It is an interprime number because it is at equal distance from previous prime (3633983) and next prime (3633991).

It is not a de Polignac number, because 3633987 - 2² = 3633983 is a prime.

3633987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3633983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8464 + ... + 8882.

It is an arithmetic number, because the mean of its divisors is an integer number (239400).

Almost surely, 2^3633987 is an apocalyptic number.

3633987 is a deficient number, since it is larger than the sum of its proper divisors (2111613).

3633987 is a wasteful number, since it uses less digits than its factorization.

3633987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495 (or 488 counting only the distinct ones).

The product of its digits is 81648, while the sum is 39.

The square root of 3633987 is about 1906.3019173258. The cubic root of 3633987 is about 153.7426832396.

The spelling of 3633987 in words is "three million, six hundred thirty-three thousand, nine hundred eighty-seven".