13040689 has 2 divisors, whose sum is σ = 13040690. Its totient is φ = 13040688.

The previous prime is 13040659. The next prime is 13040693. The reversal of 13040689 is 98604031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9199089 + 3841600 = 3033^2 + 1960^2 .

It is a cyclic number.

It is not a de Polignac number, because 13040689 - 2⁷ = 13040561 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13040689.

It is not a weakly prime, because it can be changed into another prime (13040639) 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, 6520344 + 6520345.

It is an arithmetic number, because the mean of its divisors is an integer number (6520345).

Almost surely, 2^13040689 is an apocalyptic number.

It is an amenable number.

13040689 is a deficient number, since it is larger than the sum of its proper divisors (1).

13040689 is an equidigital number, since it uses as much as digits as its factorization.

13040689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 13040689 is about 3611.1894162450. The cubic root of 13040689 is about 235.3785298322.

The spelling of 13040689 in words is "thirteen million, forty thousand, six hundred eighty-nine".