2019859 has 2 divisors, whose sum is σ = 2019860. Its totient is φ = 2019858.

The previous prime is 2019851. The next prime is 2019869. The reversal of 2019859 is 9589102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2019859 - 2³ = 2019851 is a prime.

It is a super-3 number, since 3×2019859³ = 24722046333828170337, which contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (2019851) 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, 1009929 + 1009930.

It is an arithmetic number, because the mean of its divisors is an integer number (1009930).

2^2019859 is an apocalyptic number.

2019859 is a deficient number, since it is larger than the sum of its proper divisors (1).

2019859 is an equidigital number, since it uses as much as digits as its factorization.

2019859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 2019859 is about 1421.2174358626. The cubic root of 2019859 is about 126.4077451791.

The spelling of 2019859 in words is "two million, nineteen thousand, eight hundred fifty-nine".