13378369 has 2 divisors, whose sum is σ = 13378370. Its totient is φ = 13378368.

The previous prime is 13378357. The next prime is 13378373. The reversal of 13378369 is 96387331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8625969 + 4752400 = 2937^2 + 2180^2 .

It is a cyclic number.

It is not a de Polignac number, because 13378369 - 2⁷ = 13378241 is a prime.

It is a super-2 number, since 2×13378369² = 357961514200322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13378319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6689184 + 6689185.

It is an arithmetic number, because the mean of its divisors is an integer number (6689185).

Almost surely, 2^13378369 is an apocalyptic number.

It is an amenable number.

13378369 is a deficient number, since it is larger than the sum of its proper divisors (1).

13378369 is an equidigital number, since it uses as much as digits as its factorization.

13378369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 40.

The square root of 13378369 is about 3657.6452807783. The cubic root of 13378369 is about 237.3928987087.

The spelling of 13378369 in words is "thirteen million, three hundred seventy-eight thousand, three hundred sixty-nine".