198423 has 8 divisors (see below), whose sum is σ = 294000. Its totient is φ = 132264.

The previous prime is 198413. The next prime is 198427. The reversal of 198423 is 324891.

198423 is nontrivially palindromic in base 15.

198423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 198423 - 2⁵ = 198391 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 7349 = 198423 / (1 + 9 + 8 + 4 + 2 + 3).

198423 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198427) 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, 3648 + ... + 3701.

It is an arithmetic number, because the mean of its divisors is an integer number (36750).

2¹⁹⁸⁴²³ is an apocalyptic number.

198423 is a deficient number, since it is larger than the sum of its proper divisors (95577).

198423 is an equidigital number, since it uses as much as digits as its factorization.

198423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7358 (or 7352 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 198423 is about 445.4469665404. The cubic root of 198423 is about 58.3262431292.

The spelling of 198423 in words is "one hundred ninety-eight thousand, four hundred twenty-three".