19493 has 4 divisors (see below), whose sum is σ = 19788. Its totient is φ = 19200.

The previous prime is 19489. The next prime is 19501. The reversal of 19493 is 39491.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 12769 + 6724 = 113^2 + 82^2 .

It is a cyclic number.

It is not a de Polignac number, because 19493 - 2² = 19489 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 19493.

It is not an unprimeable number, because it can be changed into a prime (19403) 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, 5 + ... + 197.

It is an arithmetic number, because the mean of its divisors is an integer number (4947).

2¹⁹⁴⁹³ is an apocalyptic number.

It is an amenable number.

19493 is a deficient number, since it is larger than the sum of its proper divisors (295).

19493 is a wasteful number, since it uses less digits than its factorization.

19493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294.

The product of its digits is 972, while the sum is 26.

The square root of 19493 is about 139.6173341674. The cubic root of 19493 is about 26.9128419495.

It can be divided in two parts, 19 and 493, that added together give a 9-th power (512 = 2⁹).

The spelling of 19493 in words is "nineteen thousand, four hundred ninety-three".