16423 has 4 divisors (see below), whose sum is σ = 17928. Its totient is φ = 14920.

The previous prime is 16421. The next prime is 16427. The reversal of 16423 is 32461.

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

It is a cyclic number.

It is not a de Polignac number, because 16423 - 2¹ = 16421 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 16397 and 16406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 736 + ... + 757.

It is an arithmetic number, because the mean of its divisors is an integer number (4482).

2¹⁶⁴²³ is an apocalyptic number.

16423 is the 69-th centered heptagonal number.

16423 is a deficient number, since it is larger than the sum of its proper divisors (1505).

16423 is a wasteful number, since it uses less digits than its factorization.

16423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504.

The product of its digits is 144, while the sum is 16.

The square root of 16423 is about 128.1522531991. The cubic root of 16423 is about 25.4185534148.

Adding to 16423 its reverse (32461), we get a palindrome (48884).

The spelling of 16423 in words is "sixteen thousand, four hundred twenty-three".