189793 has 4 divisors (see below), whose sum is σ = 193428. Its totient is φ = 186160.

The previous prime is 189767. The next prime is 189797. The reversal of 189793 is 397981.

189793 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 154449 + 35344 = 393^2 + 188^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189793 is a prime.

It is an Ulam number.

It is a Duffinian number.

189793 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (189797) 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, 1738 + ... + 1843.

It is an arithmetic number, because the mean of its divisors is an integer number (48357).

2¹⁸⁹⁷⁹³ is an apocalyptic number.

It is an amenable number.

189793 is a deficient number, since it is larger than the sum of its proper divisors (3635).

189793 is an equidigital number, since it uses as much as digits as its factorization.

189793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3634.

The product of its digits is 13608, while the sum is 37.

The square root of 189793 is about 435.6523843617. The cubic root of 189793 is about 57.4680856294.

Adding to 189793 its product of digits (13608), we get a square (203401 = 451²).

The spelling of 189793 in words is "one hundred eighty-nine thousand, seven hundred ninety-three".