13189765 has 4 divisors (see below), whose sum is σ = 15827724. Its totient is φ = 10551808.

The previous prime is 13189753. The next prime is 13189789. The reversal of 13189765 is 56798131.

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 1940449 + 11249316 = 1393^2 + 3354^2 .

It is a cyclic number.

It is not a de Polignac number, because 13189765 - 2¹⁷ = 13058693 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1318972 + ... + 1318981.

It is an arithmetic number, because the mean of its divisors is an integer number (3956931).

Almost surely, 2^13189765 is an apocalyptic number.

It is an amenable number.

13189765 is a deficient number, since it is larger than the sum of its proper divisors (2637959).

13189765 is an equidigital number, since it uses as much as digits as its factorization.

13189765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2637958.

The product of its digits is 45360, while the sum is 40.

The square root of 13189765 is about 3631.7716062550. The cubic root of 13189765 is about 236.2720517288.

The spelling of 13189765 in words is "thirteen million, one hundred eighty-nine thousand, seven hundred sixty-five".