13631689 has 2 divisors, whose sum is σ = 13631690. Its totient is φ = 13631688.

The previous prime is 13631677. The next prime is 13631707. The reversal of 13631689 is 98613631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10673289 + 2958400 = 3267^2 + 1720^2 .

It is a cyclic number.

It is not a de Polignac number, because 13631689 - 2²³ = 5243081 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13631659) 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, 6815844 + 6815845.

It is an arithmetic number, because the mean of its divisors is an integer number (6815845).

Almost surely, 2^13631689 is an apocalyptic number.

It is an amenable number.

13631689 is a deficient number, since it is larger than the sum of its proper divisors (1).

13631689 is an equidigital number, since it uses as much as digits as its factorization.

13631689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 37.

The square root of 13631689 is about 3692.1117263702. Note that the first 3 decimals coincide. The cubic root of 13631689 is about 238.8818881509.

The spelling of 13631689 in words is "thirteen million, six hundred thirty-one thousand, six hundred eighty-nine".