859939 has 2 divisors, whose sum is σ = 859940. Its totient is φ = 859938.

The previous prime is 859933. The next prime is 859973. The reversal of 859939 is 939958.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 859939 - 2¹⁷ = 728867 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 859895 and 859904.

It is not a weakly prime, because it can be changed into another prime (859933) 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, 429969 + 429970.

It is an arithmetic number, because the mean of its divisors is an integer number (429970).

2⁸⁵⁹⁹³⁹ is an apocalyptic number.

859939 is a deficient number, since it is larger than the sum of its proper divisors (1).

859939 is an equidigital number, since it uses as much as digits as its factorization.

859939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 43.

The square root of 859939 is about 927.3289599705. The cubic root of 859939 is about 95.0946056634.

The spelling of 859939 in words is "eight hundred fifty-nine thousand, nine hundred thirty-nine".