13581379 has 12 divisors (see below), whose sum is σ = 16310208. Its totient is φ = 11264400.

The previous prime is 13581361. The next prime is 13581389. The reversal of 13581379 is 97318531.

It is a happy number.

It is not a de Polignac number, because 13581379 - 2¹¹ = 13579331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13581319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2952 + ... + 5989.

It is an arithmetic number, because the mean of its divisors is an integer number (1359184).

Almost surely, 2^13581379 is an apocalyptic number.

13581379 is a deficient number, since it is larger than the sum of its proper divisors (2728829).

13581379 is an equidigital number, since it uses as much as digits as its factorization.

13581379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8986 (or 8979 counting only the distinct ones).

The product of its digits is 22680, while the sum is 37.

The square root of 13581379 is about 3685.2922543538. The cubic root of 13581379 is about 238.5876481838.

The spelling of 13581379 in words is "thirteen million, five hundred eighty-one thousand, three hundred seventy-nine".