16680239 has 2 divisors, whose sum is σ = 16680240. Its totient is φ = 16680238.

The previous prime is 16680227. The next prime is 16680241. The reversal of 16680239 is 93208661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16680239 - 2²⁰ = 15631663 is a prime.

Together with 16680241, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 16680199 and 16680208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16680289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8340119 + 8340120.

It is an arithmetic number, because the mean of its divisors is an integer number (8340120).

Almost surely, 2^16680239 is an apocalyptic number.

16680239 is a deficient number, since it is larger than the sum of its proper divisors (1).

16680239 is an equidigital number, since it uses as much as digits as its factorization.

16680239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 16680239 is about 4084.1448309285. The cubic root of 16680239 is about 255.5057960320.

The spelling of 16680239 in words is "sixteen million, six hundred eighty thousand, two hundred thirty-nine".