16722239 has 2 divisors, whose sum is σ = 16722240. Its totient is φ = 16722238.

The previous prime is 16722229. The next prime is 16722253. The reversal of 16722239 is 93222761.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16722239 - 2²⁰ = 15673663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16722229) 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, 8361119 + 8361120.

It is an arithmetic number, because the mean of its divisors is an integer number (8361120).

Almost surely, 2^16722239 is an apocalyptic number.

16722239 is a deficient number, since it is larger than the sum of its proper divisors (1).

16722239 is an equidigital number, since it uses as much as digits as its factorization.

16722239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 32.

The square root of 16722239 is about 4089.2834335614. The cubic root of 16722239 is about 255.7200665250.

It can be divided in two parts, 16722 and 239, that added together give a palindrome (16961).

The spelling of 16722239 in words is "sixteen million, seven hundred twenty-two thousand, two hundred thirty-nine".