13381493 has 4 divisors (see below), whose sum is σ = 13634028. Its totient is φ = 13128960.

The previous prime is 13381483. The next prime is 13381507. The reversal of 13381493 is 39418331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39418331 = 19 ⋅2074649.

It can be written as a sum of positive squares in 2 ways, for example, as 9721924 + 3659569 = 3118^2 + 1913^2 .

It is a cyclic number.

It is not a de Polignac number, because 13381493 - 2⁴ = 13381477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13381463) 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, 126188 + ... + 126293.

It is an arithmetic number, because the mean of its divisors is an integer number (3408507).

Almost surely, 2^13381493 is an apocalyptic number.

It is an amenable number.

13381493 is a deficient number, since it is larger than the sum of its proper divisors (252535).

13381493 is an equidigital number, since it uses as much as digits as its factorization.

13381493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252534.

The product of its digits is 7776, while the sum is 32.

The square root of 13381493 is about 3658.0723065571. The cubic root of 13381493 is about 237.4113752434.

The spelling of 13381493 in words is "thirteen million, three hundred eighty-one thousand, four hundred ninety-three".