199427 has 4 divisors (see below), whose sum is σ = 211176. Its totient is φ = 187680.

The previous prime is 199417. The next prime is 199429. The reversal of 199427 is 724991.

199427 is nontrivially palindromic in base 16.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 199427 - 2⁴ = 199411 is a prime.

It is a super-2 number, since 2×199427² = 79542256658, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 199393 and 199402.

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

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5849 + ... + 5882.

It is an arithmetic number, because the mean of its divisors is an integer number (52794).

2¹⁹⁹⁴²⁷ is an apocalyptic number.

199427 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

199427 is a deficient number, since it is larger than the sum of its proper divisors (11749).

199427 is a wasteful number, since it uses less digits than its factorization.

199427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11748.

The product of its digits is 4536, while the sum is 32.

The square root of 199427 is about 446.5725025122. The cubic root of 199427 is about 58.4244526049.

It can be divided in two parts, 199 and 427, that added together give a palindrome (626).

The spelling of 199427 in words is "one hundred ninety-nine thousand, four hundred twenty-seven".