13534681 has 2 divisors, whose sum is σ = 13534682. Its totient is φ = 13534680.

The previous prime is 13534679. The next prime is 13534687. The reversal of 13534681 is 18643531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7750656 + 5784025 = 2784^2 + 2405^2 .

It is a cyclic number.

It is not a de Polignac number, because 13534681 - 2¹ = 13534679 is a prime.

It is a super-2 number, since 2×13534681² = 366375179543522, which contains 22 as substring.

Together with 13534679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13534687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6767340 + 6767341.

It is an arithmetic number, because the mean of its divisors is an integer number (6767341).

Almost surely, 2^13534681 is an apocalyptic number.

It is an amenable number.

13534681 is a deficient number, since it is larger than the sum of its proper divisors (1).

13534681 is an equidigital number, since it uses as much as digits as its factorization.

13534681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 31.

The square root of 13534681 is about 3678.9510733360. The cubic root of 13534681 is about 238.3138821667.

The spelling of 13534681 in words is "thirteen million, five hundred thirty-four thousand, six hundred eighty-one".