13690409 has 2 divisors, whose sum is σ = 13690410. Its totient is φ = 13690408.

The previous prime is 13690403. The next prime is 13690421. The reversal of 13690409 is 90409631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12759184 + 931225 = 3572^2 + 965^2 .

It is a cyclic number.

It is not a de Polignac number, because 13690409 - 2⁸ = 13690153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13690403) 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, 6845204 + 6845205.

It is an arithmetic number, because the mean of its divisors is an integer number (6845205).

Almost surely, 2^13690409 is an apocalyptic number.

It is an amenable number.

13690409 is a deficient number, since it is larger than the sum of its proper divisors (1).

13690409 is an equidigital number, since it uses as much as digits as its factorization.

13690409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 13690409 is about 3700.0552698575. The cubic root of 13690409 is about 239.2244001556.

The spelling of 13690409 in words is "thirteen million, six hundred ninety thousand, four hundred nine".