13393381 has 4 divisors (see below), whose sum is σ = 13420512. Its totient is φ = 13366252.

The previous prime is 13393379. The next prime is 13393397. The reversal of 13393381 is 18339331.

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: 18339331 = 2089 ⋅8779.

It is a cyclic number.

It is not a de Polignac number, because 13393381 - 2¹ = 13393379 is a prime.

It is a super-2 number, since 2×13393381² = 358765309222322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13393301) 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, 12811 + ... + 13816.

It is an arithmetic number, because the mean of its divisors is an integer number (3355128).

Almost surely, 2^13393381 is an apocalyptic number.

It is an amenable number.

13393381 is a deficient number, since it is larger than the sum of its proper divisors (27131).

13393381 is an equidigital number, since it uses as much as digits as its factorization.

13393381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27130.

The product of its digits is 5832, while the sum is 31.

The square root of 13393381 is about 3659.6968453685. The cubic root of 13393381 is about 237.4816591562.

The spelling of 13393381 in words is "thirteen million, three hundred ninety-three thousand, three hundred eighty-one".