13685569 has 4 divisors (see below), whose sum is σ = 13693696. Its totient is φ = 13677444.

The previous prime is 13685563. The next prime is 13685579. The reversal of 13685569 is 96558631.

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 13685569 - 2⁵ = 13685537 is a prime.

It is a super-2 number, since 2×13685569² = 374589597707522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13685563) 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, 489 + ... + 5254.

It is an arithmetic number, because the mean of its divisors is an integer number (3423424).

Almost surely, 2^13685569 is an apocalyptic number.

It is an amenable number.

13685569 is a deficient number, since it is larger than the sum of its proper divisors (8127).

13685569 is an equidigital number, since it uses as much as digits as its factorization.

13685569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8126.

The product of its digits is 194400, while the sum is 43.

The square root of 13685569 is about 3699.4011677567. The cubic root of 13685569 is about 239.1962056590.

The spelling of 13685569 in words is "thirteen million, six hundred eighty-five thousand, five hundred sixty-nine".