13581393 has 16 divisors (see below), whose sum is σ = 20837376. Its totient is φ = 7707600.

The previous prime is 13581389. The next prime is 13581397. The reversal of 13581393 is 39318531.

It is an interprime number because it is at equal distance from previous prime (13581389) and next prime (13581397).

It is not a de Polignac number, because 13581393 - 2² = 13581389 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13581397) 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 15 ways as a sum of consecutive naturals, for example, 1030 + ... + 5312.

It is an arithmetic number, because the mean of its divisors is an integer number (1302336).

Almost surely, 2^13581393 is an apocalyptic number.

It is an amenable number.

13581393 is a deficient number, since it is larger than the sum of its proper divisors (7255983).

13581393 is a wasteful number, since it uses less digits than its factorization.

13581393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4444.

The product of its digits is 9720, while the sum is 33.

The square root of 13581393 is about 3685.2941537956. The cubic root of 13581393 is about 238.5877301643.

The spelling of 13581393 in words is "thirteen million, five hundred eighty-one thousand, three hundred ninety-three".