13634989 has 4 divisors (see below), whose sum is σ = 14352640. Its totient is φ = 12917340.

The previous prime is 13634987. The next prime is 13634993. The reversal of 13634989 is 98943631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 13634989 - 2¹ = 13634987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13634983) 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 in 3 ways as a sum of consecutive naturals, for example, 358797 + ... + 358834.

It is an arithmetic number, because the mean of its divisors is an integer number (3588160).

Almost surely, 2^13634989 is an apocalyptic number.

13634989 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13634989 is a deficient number, since it is larger than the sum of its proper divisors (717651).

13634989 is an equidigital number, since it uses as much as digits as its factorization.

13634989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717650.

The product of its digits is 139968, while the sum is 43.

The square root of 13634989 is about 3692.5585980455. The cubic root of 13634989 is about 238.9011630094.

The spelling of 13634989 in words is "thirteen million, six hundred thirty-four thousand, nine hundred eighty-nine".