13489565 has 4 divisors (see below), whose sum is σ = 16187484. Its totient is φ = 10791648.

The previous prime is 13489561. The next prime is 13489603. The reversal of 13489565 is 56598431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56598431 = 71 ⋅797161.

It can be written as a sum of positive squares in 2 ways, for example, as 6461764 + 7027801 = 2542^2 + 2651^2 .

It is a cyclic number.

It is not a de Polignac number, because 13489565 - 2² = 13489561 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 (13489561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1348952 + ... + 1348961.

It is an arithmetic number, because the mean of its divisors is an integer number (4046871).

Almost surely, 2^13489565 is an apocalyptic number.

It is an amenable number.

13489565 is a deficient number, since it is larger than the sum of its proper divisors (2697919).

13489565 is an equidigital number, since it uses as much as digits as its factorization.

13489565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2697918.

The product of its digits is 129600, while the sum is 41.

The square root of 13489565 is about 3672.8143160252. The cubic root of 13489565 is about 238.0487918703.

The spelling of 13489565 in words is "thirteen million, four hundred eighty-nine thousand, five hundred sixty-five".