199423 has 8 divisors (see below), whose sum is σ = 235520. Its totient is φ = 165240.

The previous prime is 199417. The next prime is 199429. The reversal of 199423 is 324991.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (199417) and next prime (199429).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 199423 - 2¹³ = 191231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 199391 and 199400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243 + ... + 676.

It is an arithmetic number, because the mean of its divisors is an integer number (29440).

2¹⁹⁹⁴²³ is an apocalyptic number.

199423 is a deficient number, since it is larger than the sum of its proper divisors (36097).

199423 is an equidigital number, since it uses as much as digits as its factorization.

199423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957.

The product of its digits is 1944, while the sum is 28.

The square root of 199423 is about 446.5680239336. The cubic root of 199423 is about 58.4240619868.

The spelling of 199423 in words is "one hundred ninety-nine thousand, four hundred twenty-three".