1996859 has 2 divisors, whose sum is σ = 1996860. Its totient is φ = 1996858.

The previous prime is 1996849. The next prime is 1996867. The reversal of 1996859 is 9586991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1996859 - 2¹² = 1992763 is a prime.

It is a super-3 number, since 3×1996859³ = 23887101492891803337, which contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1996829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998429 + 998430.

It is an arithmetic number, because the mean of its divisors is an integer number (998430).

2^1996859 is an apocalyptic number.

1996859 is a deficient number, since it is larger than the sum of its proper divisors (1).

1996859 is an equidigital number, since it uses as much as digits as its factorization.

1996859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174960, while the sum is 47.

The square root of 1996859 is about 1413.1026148161. The cubic root of 1996859 is about 125.9261135639.

It can be divided in two parts, 19 and 96859, that multiplied together give a triangular number (1840321 = T₁₉₁₈).

The spelling of 1996859 in words is "one million, nine hundred ninety-six thousand, eight hundred fifty-nine".