13586681 has 2 divisors, whose sum is σ = 13586682. Its totient is φ = 13586680.

The previous prime is 13586669. The next prime is 13586717. The reversal of 13586681 is 18668531.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13075456 + 511225 = 3616^2 + 715^2 .

It is a cyclic number.

It is not a de Polignac number, because 13586681 - 2¹⁸ = 13324537 is a prime.

It is a super-2 number, since 2×13586681² = 369195801191522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13586641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6793340 + 6793341.

It is an arithmetic number, because the mean of its divisors is an integer number (6793341).

Almost surely, 2^13586681 is an apocalyptic number.

It is an amenable number.

13586681 is a deficient number, since it is larger than the sum of its proper divisors (1).

13586681 is an equidigital number, since it uses as much as digits as its factorization.

13586681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 38.

The square root of 13586681 is about 3686.0115300959. The cubic root of 13586681 is about 238.6186913529.

The spelling of 13586681 in words is "thirteen million, five hundred eighty-six thousand, six hundred eighty-one".