859025509 has 2 divisors, whose sum is σ = 859025510. Its totient is φ = 859025508.

The previous prime is 859025477. The next prime is 859025513. The reversal of 859025509 is 905520958.

859025509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 846984609 + 12040900 = 29103^2 + 3470^2 .

It is a cyclic number.

It is not a de Polignac number, because 859025509 - 2⁵ = 859025477 is a prime.

It is a super-2 number, since 2×859025509² = 1475849650225418162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (859025569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429512754 + 429512755.

It is an arithmetic number, because the mean of its divisors is an integer number (429512755).

Almost surely, 2^859025509 is an apocalyptic number.

It is an amenable number.

859025509 is a deficient number, since it is larger than the sum of its proper divisors (1).

859025509 is an equidigital number, since it uses as much as digits as its factorization.

859025509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162000, while the sum is 43.

The square root of 859025509 is about 29309.1369541991. The cubic root of 859025509 is about 950.6092155179.

The spelling of 859025509 in words is "eight hundred fifty-nine million, twenty-five thousand, five hundred nine".