13145689 has 4 divisors (see below), whose sum is σ = 13154256. Its totient is φ = 13137124.

The previous prime is 13145681. The next prime is 13145723. The reversal of 13145689 is 98654131.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13145689 - 2³ = 13145681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13145681) 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, 1279 + ... + 5284.

It is an arithmetic number, because the mean of its divisors is an integer number (3288564).

Almost surely, 2^13145689 is an apocalyptic number.

It is an amenable number.

13145689 is a deficient number, since it is larger than the sum of its proper divisors (8567).

13145689 is an equidigital number, since it uses as much as digits as its factorization.

13145689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8566.

The product of its digits is 25920, while the sum is 37.

The square root of 13145689 is about 3625.6984154780. The cubic root of 13145689 is about 236.0085760074.

The spelling of 13145689 in words is "thirteen million, one hundred forty-five thousand, six hundred eighty-nine".