13418681 has 2 divisors, whose sum is σ = 13418682. Its totient is φ = 13418680.

The previous prime is 13418653. The next prime is 13418749. The reversal of 13418681 is 18681431.

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., 11833600 + 1585081 = 3440^2 + 1259^2 .

It is an emirp because it is prime and its reverse (18681431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13418681 - 2¹⁴ = 13402297 is a prime.

It is a super-2 number, since 2×13418681² = 360121999559522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13418981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6709340 + 6709341.

It is an arithmetic number, because the mean of its divisors is an integer number (6709341).

Almost surely, 2^13418681 is an apocalyptic number.

It is an amenable number.

13418681 is a deficient number, since it is larger than the sum of its proper divisors (1).

13418681 is an equidigital number, since it uses as much as digits as its factorization.

13418681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 32.

The square root of 13418681 is about 3663.1517850070. The cubic root of 13418681 is about 237.6310988119.

The spelling of 13418681 in words is "thirteen million, four hundred eighteen thousand, six hundred eighty-one".