13629989 has 2 divisors, whose sum is σ = 13629990. Its totient is φ = 13629988.

The previous prime is 13629929. The next prime is 13629991. The reversal of 13629989 is 98992631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12837889 + 792100 = 3583^2 + 890^2 .

It is a cyclic number.

It is not a de Polignac number, because 13629989 - 2¹² = 13625893 is a prime.

Together with 13629991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13629919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6814994 + 6814995.

It is an arithmetic number, because the mean of its divisors is an integer number (6814995).

Almost surely, 2^13629989 is an apocalyptic number.

It is an amenable number.

13629989 is a deficient number, since it is larger than the sum of its proper divisors (1).

13629989 is an equidigital number, since it uses as much as digits as its factorization.

13629989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 47.

The square root of 13629989 is about 3691.8814986400. The cubic root of 13629989 is about 238.8719574643.

The spelling of 13629989 in words is "thirteen million, six hundred twenty-nine thousand, nine hundred eighty-nine".