13819493 has 4 divisors (see below), whose sum is σ = 13962060. Its totient is φ = 13676928.

The previous prime is 13819471. The next prime is 13819499. The reversal of 13819493 is 39491831.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5536609 + 8282884 = 2353^2 + 2878^2 .

It is a cyclic number.

It is not a de Polignac number, because 13819493 - 2²⁰ = 12770917 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 (13819499) 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, 71138 + ... + 71331.

It is an arithmetic number, because the mean of its divisors is an integer number (3490515).

Almost surely, 2^13819493 is an apocalyptic number.

It is an amenable number.

13819493 is a deficient number, since it is larger than the sum of its proper divisors (142567).

13819493 is an equidigital number, since it uses as much as digits as its factorization.

13819493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142566.

The product of its digits is 23328, while the sum is 38.

The square root of 13819493 is about 3717.4578679522. The cubic root of 13819493 is about 239.9739149891.

The spelling of 13819493 in words is "thirteen million, eight hundred nineteen thousand, four hundred ninety-three".