16433939 has 4 divisors (see below), whose sum is σ = 16618680. Its totient is φ = 16249200.

The previous prime is 16433909. The next prime is 16433941. The reversal of 16433939 is 93933461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93933461 = 6637 ⋅14153.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16433939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16433909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92237 + ... + 92414.

It is an arithmetic number, because the mean of its divisors is an integer number (4154670).

Almost surely, 2^16433939 is an apocalyptic number.

16433939 is a deficient number, since it is larger than the sum of its proper divisors (184741).

16433939 is an equidigital number, since it uses as much as digits as its factorization.

16433939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184740.

The product of its digits is 52488, while the sum is 38.

The square root of 16433939 is about 4053.8794999358. The cubic root of 16433939 is about 254.2419574254.

The spelling of 16433939 in words is "sixteen million, four hundred thirty-three thousand, nine hundred thirty-nine".