13849421 has 2 divisors, whose sum is σ = 13849422. Its totient is φ = 13849420.

The previous prime is 13849399. The next prime is 13849453. The reversal of 13849421 is 12494831.

It is a happy number.

It is an a-pointer prime, because the next prime (13849453) can be obtained adding 13849421 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12859396 + 990025 = 3586^2 + 995^2 .

It is an emirp because it is prime and its reverse (12494831) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13849421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13849481) 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, 6924710 + 6924711.

It is an arithmetic number, because the mean of its divisors is an integer number (6924711).

Almost surely, 2^13849421 is an apocalyptic number.

It is an amenable number.

13849421 is a deficient number, since it is larger than the sum of its proper divisors (1).

13849421 is an equidigital number, since it uses as much as digits as its factorization.

13849421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 32.

The square root of 13849421 is about 3721.4810223888. The cubic root of 13849421 is about 240.1470221854.

The spelling of 13849421 in words is "thirteen million, eight hundred forty-nine thousand, four hundred twenty-one".