13378669 has 4 divisors (see below), whose sum is σ = 13705020. Its totient is φ = 13052320.

The previous prime is 13378667. The next prime is 13378693. The reversal of 13378669 is 96687331.

13378669 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 324900 + 13053769 = 570^2 + 3613^2 .

It is a cyclic number.

It is not a de Polignac number, because 13378669 - 2¹ = 13378667 is a prime.

It is a super-2 number, since 2×13378669² = 357977568423122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13378661) 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, 163114 + ... + 163195.

It is an arithmetic number, because the mean of its divisors is an integer number (3426255).

Almost surely, 2^13378669 is an apocalyptic number.

It is an amenable number.

13378669 is a deficient number, since it is larger than the sum of its proper divisors (326351).

13378669 is an equidigital number, since it uses as much as digits as its factorization.

13378669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326350.

The product of its digits is 163296, while the sum is 43.

The square root of 13378669 is about 3657.6862905394. The cubic root of 13378669 is about 237.3946731487.

The spelling of 13378669 in words is "thirteen million, three hundred seventy-eight thousand, six hundred sixty-nine".