16433 has 2 divisors, whose sum is σ = 16434. Its totient is φ = 16432.

The previous prime is 16427. The next prime is 16447. The reversal of 16433 is 33461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16384 + 49 = 128^2 + 7^2 .

It is an emirp because it is prime and its reverse (33461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16433 - 2⁴ = 16417 is a prime.

It is a d-powerful number, because it can be written as 1 + 6² + 4⁷ + 3 + 3² .

It is a plaindrome in base 9 and base 11.

It is a nialpdrome in base 13.

It is not a weakly prime, because it can be changed into another prime (16453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8216 + 8217.

It is an arithmetic number, because the mean of its divisors is an integer number (8217).

2¹⁶⁴³³ is an apocalyptic number.

It is an amenable number.

16433 is a deficient number, since it is larger than the sum of its proper divisors (1).

16433 is an equidigital number, since it uses as much as digits as its factorization.

16433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 17.

The square root of 16433 is about 128.1912633529. The cubic root of 16433 is about 25.4237115053.

Adding to 16433 its reverse (33461), we get a palindrome (49894).

The spelling of 16433 in words is "sixteen thousand, four hundred thirty-three".