13631641 has 2 divisors, whose sum is σ = 13631642. Its totient is φ = 13631640.

The previous prime is 13631621. The next prime is 13631659. The reversal of 13631641 is 14613631.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8323225 + 5308416 = 2885^2 + 2304^2 .

It is a cyclic number.

It is not a de Polignac number, because 13631641 - 2¹⁵ = 13598873 is a prime.

It is not a weakly prime, because it can be changed into another prime (13631621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6815820 + 6815821.

It is an arithmetic number, because the mean of its divisors is an integer number (6815821).

Almost surely, 2^13631641 is an apocalyptic number.

It is an amenable number.

13631641 is a deficient number, since it is larger than the sum of its proper divisors (1).

13631641 is an equidigital number, since it uses as much as digits as its factorization.

13631641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 25.

The square root of 13631641 is about 3692.1052260194. The cubic root of 13631641 is about 238.8816077664.

The spelling of 13631641 in words is "thirteen million, six hundred thirty-one thousand, six hundred forty-one".