13813249 has 4 divisors (see below), whose sum is σ = 13822164. Its totient is φ = 13804336.

The previous prime is 13813237. The next prime is 13813297. The reversal of 13813249 is 94231831.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 94231831 = 73 ⋅1290847.

It can be written as a sum of positive squares in 2 ways, for example, as 3732624 + 10080625 = 1932^2 + 3175^2 .

It is a cyclic number.

It is not a de Polignac number, because 13813249 - 2¹⁷ = 13682177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13813249.

It is not an unprimeable number, because it can be changed into a prime (13813649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1462 + ... + 5455.

It is an arithmetic number, because the mean of its divisors is an integer number (3455541).

Almost surely, 2^13813249 is an apocalyptic number.

It is an amenable number.

13813249 is a deficient number, since it is larger than the sum of its proper divisors (8915).

13813249 is an equidigital number, since it uses as much as digits as its factorization.

13813249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8914.

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

The square root of 13813249 is about 3716.6179518482. The cubic root of 13813249 is about 239.9377674292.

The spelling of 13813249 in words is "thirteen million, eight hundred thirteen thousand, two hundred forty-nine".