13340681 has 2 divisors, whose sum is σ = 13340682. Its totient is φ = 13340680.

The previous prime is 13340671. The next prime is 13340689. The reversal of 13340681 is 18604331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13075456 + 265225 = 3616^2 + 515^2 .

It is a cyclic number.

It is not a de Polignac number, because 13340681 - 2¹⁸ = 13078537 is a prime.

It is a super-2 number, since 2×13340681² = 355947539087522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13340681.

It is not a weakly prime, because it can be changed into another prime (13340689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6670340 + 6670341.

It is an arithmetic number, because the mean of its divisors is an integer number (6670341).

Almost surely, 2^13340681 is an apocalyptic number.

It is an amenable number.

13340681 is a deficient number, since it is larger than the sum of its proper divisors (1).

13340681 is an equidigital number, since it uses as much as digits as its factorization.

13340681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 13340681 is about 3652.4896988219. The cubic root of 13340681 is about 237.1697704111.

The spelling of 13340681 in words is "thirteen million, three hundred forty thousand, six hundred eighty-one".