13778249 has 8 divisors (see below), whose sum is σ = 14679840. Its totient is φ = 12894336.

The previous prime is 13778231. The next prime is 13778267. The reversal of 13778249 is 94287731.

13778249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13778231) and next prime (13778267).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13778249 - 2¹² = 13774153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13778209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2792 + ... + 5945.

It is an arithmetic number, because the mean of its divisors is an integer number (1834980).

Almost surely, 2^13778249 is an apocalyptic number.

13778249 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13778249 is a deficient number, since it is larger than the sum of its proper divisors (901591).

13778249 is an equidigital number, since it uses as much as digits as its factorization.

13778249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8839.

The product of its digits is 84672, while the sum is 41.

The square root of 13778249 is about 3711.9063835178. The cubic root of 13778249 is about 239.7349446499.

The spelling of 13778249 in words is "thirteen million, seven hundred seventy-eight thousand, two hundred forty-nine".