609859 has 2 divisors, whose sum is σ = 609860. Its totient is φ = 609858.

The previous prime is 609821. The next prime is 609877. The reversal of 609859 is 958906.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 609859 - 2¹⁷ = 478787 is a prime.

It is not a weakly prime, because it can be changed into another prime (609809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304929 + 304930.

It is an arithmetic number, because the mean of its divisors is an integer number (304930).

2⁶⁰⁹⁸⁵⁹ is an apocalyptic number.

609859 is a deficient number, since it is larger than the sum of its proper divisors (1).

609859 is an equidigital number, since it uses as much as digits as its factorization.

609859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 609859 is about 780.9346963735. The cubic root of 609859 is about 84.8027258973.

The spelling of 609859 in words is "six hundred nine thousand, eight hundred fifty-nine".