1009859 has 2 divisors, whose sum is σ = 1009860. Its totient is φ = 1009858.

The previous prime is 1009843. The next prime is 1009873. The reversal of 1009859 is 9589001.

It is a strong prime.

It is an emirp because it is prime and its reverse (9589001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1009859 - 2⁴ = 1009843 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1009819) 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, 504929 + 504930.

It is an arithmetic number, because the mean of its divisors is an integer number (504930).

2^1009859 is an apocalyptic number.

1009859 is a deficient number, since it is larger than the sum of its proper divisors (1).

1009859 is an equidigital number, since it uses as much as digits as its factorization.

1009859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 1009859 is about 1004.9174095417. The cubic root of 1009859 is about 100.3275592114.

The spelling of 1009859 in words is "one million, nine thousand, eight hundred fifty-nine".