3631637 has 2 divisors, whose sum is σ = 3631638. Its totient is φ = 3631636.

The previous prime is 3631633. The next prime is 3631703. The reversal of 3631637 is 7361363.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1957201 + 1674436 = 1399^2 + 1294^2 .

It is an emirp because it is prime and its reverse (7361363) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3631637 - 2² = 3631633 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3631633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1815818 + 1815819.

It is an arithmetic number, because the mean of its divisors is an integer number (1815819).

Almost surely, 2^3631637 is an apocalyptic number.

It is an amenable number.

3631637 is a deficient number, since it is larger than the sum of its proper divisors (1).

3631637 is an equidigital number, since it uses as much as digits as its factorization.

3631637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 29.

The square root of 3631637 is about 1905.6854409897. The cubic root of 3631637 is about 153.7095356973.

The spelling of 3631637 in words is "three million, six hundred thirty-one thousand, six hundred thirty-seven".