190423 has 4 divisors (see below), whose sum is σ = 192280. Its totient is φ = 188568.

The previous prime is 190409. The next prime is 190471. The reversal of 190423 is 324091.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324091 = 43 ⋅7537.

It is a cyclic number.

It is not a de Polignac number, because 190423 - 2⁵ = 190391 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 190423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 765 + ... + 982.

It is an arithmetic number, because the mean of its divisors is an integer number (48070).

2¹⁹⁰⁴²³ is an apocalyptic number.

190423 is a deficient number, since it is larger than the sum of its proper divisors (1857).

190423 is a wasteful number, since it uses less digits than its factorization.

190423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 190423 is about 436.3748388714. The cubic root of 190423 is about 57.5316020360.

The spelling of 190423 in words is "one hundred ninety thousand, four hundred twenty-three".