16706399 has 2 divisors, whose sum is σ = 16706400. Its totient is φ = 16706398.

The previous prime is 16706369. The next prime is 16706401. The reversal of 16706399 is 99360761.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (99360761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16706399 - 2⁸ = 16706143 is a prime.

Together with 16706401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16706369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8353199 + 8353200.

It is an arithmetic number, because the mean of its divisors is an integer number (8353200).

Almost surely, 2^16706399 is an apocalyptic number.

16706399 is a deficient number, since it is larger than the sum of its proper divisors (1).

16706399 is an equidigital number, since it uses as much as digits as its factorization.

16706399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 16706399 is about 4087.3462050578. The cubic root of 16706399 is about 255.6392981244.

The spelling of 16706399 in words is "sixteen million, seven hundred six thousand, three hundred ninety-nine".