13849909 has 2 divisors, whose sum is σ = 13849910. Its totient is φ = 13849908.

The previous prime is 13849903. The next prime is 13849921. The reversal of 13849909 is 90994831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13118884 + 731025 = 3622^2 + 855^2 .

It is a cyclic number.

It is not a de Polignac number, because 13849909 - 2¹¹ = 13847861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13849903) 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, 6924954 + 6924955.

It is an arithmetic number, because the mean of its divisors is an integer number (6924955).

Almost surely, 2^13849909 is an apocalyptic number.

It is an amenable number.

13849909 is a deficient number, since it is larger than the sum of its proper divisors (1).

13849909 is an equidigital number, since it uses as much as digits as its factorization.

13849909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 13849909 is about 3721.5465871060. The cubic root of 13849909 is about 240.1498427696.

The spelling of 13849909 in words is "thirteen million, eight hundred forty-nine thousand, nine hundred nine".