3687631 has 2 divisors, whose sum is σ = 3687632. Its totient is φ = 3687630.

The previous prime is 3687583. The next prime is 3687683. The reversal of 3687631 is 1367863.

3687631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3687631 - 2⁹ = 3687119 is a prime.

It is a super-2 number, since 2×3687631² = 27197244784322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3687731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1843815 + 1843816.

It is an arithmetic number, because the mean of its divisors is an integer number (1843816).

Almost surely, 2^3687631 is an apocalyptic number.

3687631 is a deficient number, since it is larger than the sum of its proper divisors (1).

3687631 is an equidigital number, since it uses as much as digits as its factorization.

3687631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 34.

The square root of 3687631 is about 1920.3205461589. The cubic root of 3687631 is about 154.4954946093.

The spelling of 3687631 in words is "three million, six hundred eighty-seven thousand, six hundred thirty-one".