13378091 has 4 divisors (see below), whose sum is σ = 13577832. Its totient is φ = 13178352.

The previous prime is 13378067. The next prime is 13378153. The reversal of 13378091 is 19087331.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13378091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13378591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99770 + ... + 99903.

It is an arithmetic number, because the mean of its divisors is an integer number (3394458).

Almost surely, 2^13378091 is an apocalyptic number.

13378091 is a deficient number, since it is larger than the sum of its proper divisors (199741).

13378091 is an equidigital number, since it uses as much as digits as its factorization.

13378091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199740.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 13378091 is about 3657.6072779893. The cubic root of 13378091 is about 237.3912543707.

The spelling of 13378091 in words is "thirteen million, three hundred seventy-eight thousand, ninety-one".