13378243 has 2 divisors, whose sum is σ = 13378244. Its totient is φ = 13378242.

The previous prime is 13378241. The next prime is 13378247. The reversal of 13378243 is 34287331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13378243 - 2¹ = 13378241 is a prime.

Together with 13378241, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13378241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6689121 + 6689122.

It is an arithmetic number, because the mean of its divisors is an integer number (6689122).

Almost surely, 2^13378243 is an apocalyptic number.

13378243 is a deficient number, since it is larger than the sum of its proper divisors (1).

13378243 is an equidigital number, since it uses as much as digits as its factorization.

13378243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 31.

The square root of 13378243 is about 3657.6280565416. The cubic root of 13378243 is about 237.3921534360.

It can be divided in two parts, 1 and 3378243, that added together give a square (3378244 = 1838²).

The spelling of 13378243 in words is "thirteen million, three hundred seventy-eight thousand, two hundred forty-three".