16859839 has 2 divisors, whose sum is σ = 16859840. Its totient is φ = 16859838.

The previous prime is 16859837. The next prime is 16859849. The reversal of 16859839 is 93895861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16859839 - 2¹ = 16859837 is a prime.

It is a super-2 number, since 2×16859839² = 568508342211842, which contains 22 as substring.

Together with 16859837, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 16859792 and 16859801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16859837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8429919 + 8429920.

It is an arithmetic number, because the mean of its divisors is an integer number (8429920).

Almost surely, 2^16859839 is an apocalyptic number.

16859839 is a deficient number, since it is larger than the sum of its proper divisors (1).

16859839 is an equidigital number, since it uses as much as digits as its factorization.

16859839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 49.

The square root of 16859839 is about 4106.0734284715. The cubic root of 16859839 is about 256.4195543330.

The spelling of 16859839 in words is "sixteen million, eight hundred fifty-nine thousand, eight hundred thirty-nine".