13112989 has 4 divisors (see below), whose sum is σ = 13432860. Its totient is φ = 12793120.

The previous prime is 13112971. The next prime is 13113011. The reversal of 13112989 is 98921131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1265625 + 11847364 = 1125^2 + 3442^2 .

It is a cyclic number.

It is not a de Polignac number, because 13112989 - 2¹⁹ = 12588701 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 (13112909) 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, 159874 + ... + 159955.

It is an arithmetic number, because the mean of its divisors is an integer number (3358215).

Almost surely, 2^13112989 is an apocalyptic number.

It is an amenable number.

13112989 is a deficient number, since it is larger than the sum of its proper divisors (319871).

13112989 is an equidigital number, since it uses as much as digits as its factorization.

13112989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319870.

The product of its digits is 3888, while the sum is 34.

The square root of 13112989 is about 3621.1861316425. The cubic root of 13112989 is about 235.8127224874.

The spelling of 13112989 in words is "thirteen million, one hundred twelve thousand, nine hundred eighty-nine".