13105989 has 16 divisors (see below), whose sum is σ = 20910400. Its totient is φ = 8065008.

The previous prime is 13105987. The next prime is 13106003. The reversal of 13105989 is 98950131.

It is a happy number.

It is not a de Polignac number, because 13105989 - 2¹ = 13105987 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 (13105987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18319 + ... + 19020.

It is an arithmetic number, because the mean of its divisors is an integer number (1306900).

Almost surely, 2^13105989 is an apocalyptic number.

It is an amenable number.

13105989 is a deficient number, since it is larger than the sum of its proper divisors (7804411).

13105989 is a wasteful number, since it uses less digits than its factorization.

13105989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37361 (or 37355 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 13105989 is about 3620.2194684853. The cubic root of 13105989 is about 235.7707543577.

The spelling of 13105989 in words is "thirteen million, one hundred five thousand, nine hundred eighty-nine".