13378361 has 4 divisors (see below), whose sum is σ = 13508352. Its totient is φ = 13248372.

The previous prime is 13378357. The next prime is 13378369. The reversal of 13378361 is 16387331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16387331 = 41 ⋅399691.

It is a cyclic number.

It is not a de Polignac number, because 13378361 - 2² = 13378357 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13378369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64841 + ... + 65046.

It is an arithmetic number, because the mean of its divisors is an integer number (3377088).

Almost surely, 2^13378361 is an apocalyptic number.

It is an amenable number.

13378361 is a deficient number, since it is larger than the sum of its proper divisors (129991).

13378361 is a wasteful number, since it uses less digits than its factorization.

13378361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129990.

The product of its digits is 9072, while the sum is 32.

The square root of 13378361 is about 3657.6441871784. The cubic root of 13378361 is about 237.3928513899.

The spelling of 13378361 in words is "thirteen million, three hundred seventy-eight thousand, three hundred sixty-one".