1984459 has 2 divisors, whose sum is σ = 1984460. Its totient is φ = 1984458.

The previous prime is 1984457. The next prime is 1984471. The reversal of 1984459 is 9544891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1984459 - 2¹ = 1984457 is a prime.

Together with 1984457, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1984453) 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, 992229 + 992230.

It is an arithmetic number, because the mean of its divisors is an integer number (992230).

2^1984459 is an apocalyptic number.

1984459 is a deficient number, since it is larger than the sum of its proper divisors (1).

1984459 is an equidigital number, since it uses as much as digits as its factorization.

1984459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 40.

The square root of 1984459 is about 1408.7082735613. The cubic root of 1984459 is about 125.6649154944.

The spelling of 1984459 in words is "one million, nine hundred eighty-four thousand, four hundred fifty-nine".