1984859 has 2 divisors, whose sum is σ = 1984860. Its totient is φ = 1984858.

The previous prime is 1984849. The next prime is 1984867. The reversal of 1984859 is 9584891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1984859 - 2¹² = 1980763 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1984849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992429 + 992430.

It is an arithmetic number, because the mean of its divisors is an integer number (992430).

2^1984859 is an apocalyptic number.

1984859 is a deficient number, since it is larger than the sum of its proper divisors (1).

1984859 is an equidigital number, since it uses as much as digits as its factorization.

1984859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 44.

The square root of 1984859 is about 1408.8502404443. The cubic root of 1984859 is about 125.6733581967.

The spelling of 1984859 in words is "one million, nine hundred eighty-four thousand, eight hundred fifty-nine".