855798959 has 2 divisors, whose sum is σ = 855798960. Its totient is φ = 855798958.

The previous prime is 855798907. The next prime is 855798967. The reversal of 855798959 is 959897558.

855798959 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-855798959 is a prime.

It is a super-3 number, since 3×855798959³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 855798895 and 855798904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855798259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427899479 + 427899480.

It is an arithmetic number, because the mean of its divisors is an integer number (427899480).

Almost surely, 2^855798959 is an apocalyptic number.

855798959 is a deficient number, since it is larger than the sum of its proper divisors (1).

855798959 is an equidigital number, since it uses as much as digits as its factorization.

855798959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824000, while the sum is 65.

The square root of 855798959 is about 29254.0417549439. The cubic root of 855798959 is about 949.4175410198.

The spelling of 855798959 in words is "eight hundred fifty-five million, seven hundred ninety-eight thousand, nine hundred fifty-nine".