3631663 has 4 divisors (see below), whose sum is σ = 4150480. Its totient is φ = 3112848.

The previous prime is 3631637. The next prime is 3631703. The reversal of 3631663 is 3661363.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3661363 = 59 ⋅62057.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3631663 is a prime.

It is a super-2 number, since 2×3631663² = 26377952291138, 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 (3631633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 259398 + ... + 259411.

It is an arithmetic number, because the mean of its divisors is an integer number (1037620).

Almost surely, 2^3631663 is an apocalyptic number.

3631663 is a deficient number, since it is larger than the sum of its proper divisors (518817).

3631663 is an equidigital number, since it uses as much as digits as its factorization.

3631663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518816.

The product of its digits is 5832, while the sum is 28.

The square root of 3631663 is about 1905.6922626699. The cubic root of 3631663 is about 153.7099025143.

The spelling of 3631663 in words is "three million, six hundred thirty-one thousand, six hundred sixty-three".