189719 has 4 divisors (see below), whose sum is σ = 190896. Its totient is φ = 188544.

The previous prime is 189713. The next prime is 189733. The reversal of 189719 is 917981.

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, and also an emirpimes, since its reverse is a distinct semiprime: 917981 = 59 ⋅15559.

It is a cyclic number.

It is not a de Polignac number, because 189719 - 2⁸ = 189463 is a prime.

It is a super-2 number, since 2×189719² = 71986597922, which contains 22 as substring.

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 189719.

It is not an unprimeable number, because it can be changed into a prime (189713) 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, 299 + ... + 684.

It is an arithmetic number, because the mean of its divisors is an integer number (47724).

2¹⁸⁹⁷¹⁹ is an apocalyptic number.

189719 is a deficient number, since it is larger than the sum of its proper divisors (1177).

189719 is an equidigital number, since it uses as much as digits as its factorization.

189719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176.

The product of its digits is 4536, while the sum is 35.

The square root of 189719 is about 435.5674459828. The cubic root of 189719 is about 57.4606157523.

The spelling of 189719 in words is "one hundred eighty-nine thousand, seven hundred nineteen".