13336681 has 2 divisors, whose sum is σ = 13336682. Its totient is φ = 13336680.

The previous prime is 13336669. The next prime is 13336691. The reversal of 13336681 is 18663331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7290000 + 6046681 = 2700^2 + 2459^2 .

It is a cyclic number.

It is not a de Polignac number, because 13336681 - 2⁵ = 13336649 is a prime.

It is a super-2 number, since 2×13336681² = 355734120191522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13336621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6668340 + 6668341.

It is an arithmetic number, because the mean of its divisors is an integer number (6668341).

Almost surely, 2^13336681 is an apocalyptic number.

It is an amenable number.

13336681 is a deficient number, since it is larger than the sum of its proper divisors (1).

13336681 is an equidigital number, since it uses as much as digits as its factorization.

13336681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The square root of 13336681 is about 3651.9420860687. The cubic root of 13336681 is about 237.1460641273.

The spelling of 13336681 in words is "thirteen million, three hundred thirty-six thousand, six hundred eighty-one".