16440043 has 2 divisors, whose sum is σ = 16440044. Its totient is φ = 16440042.

The previous prime is 16440041. The next prime is 16440077. The reversal of 16440043 is 34004461.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (34004461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16440043 - 2¹ = 16440041 is a prime.

Together with 16440041, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 16439996 and 16440023.

It is not a weakly prime, because it can be changed into another prime (16440041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8220021 + 8220022.

It is an arithmetic number, because the mean of its divisors is an integer number (8220022).

Almost surely, 2^16440043 is an apocalyptic number.

16440043 is a deficient number, since it is larger than the sum of its proper divisors (1).

16440043 is an equidigital number, since it uses as much as digits as its factorization.

16440043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 16440043 is about 4054.6322891231. The cubic root of 16440043 is about 254.2734309268.

The spelling of 16440043 in words is "sixteen million, four hundred forty thousand, forty-three".