855785069 has 4 divisors (see below), whose sum is σ = 855946140. Its totient is φ = 855624000.

The previous prime is 855785027. The next prime is 855785089. The reversal of 855785069 is 960587558.

855785069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 482329444 + 373455625 = 21962^2 + 19325^2 .

It is a cyclic number.

It is not a de Polignac number, because 855785069 - 2²⁴ = 839007853 is a prime.

It is a super-2 number, since 2×855785069² = 1464736168646669522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 855785069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855785009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72284 + ... + 83285.

It is an arithmetic number, because the mean of its divisors is an integer number (213986535).

Almost surely, 2^855785069 is an apocalyptic number.

It is an amenable number.

855785069 is a deficient number, since it is larger than the sum of its proper divisors (161071).

855785069 is a wasteful number, since it uses less digits than its factorization.

855785069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161070.

The product of its (nonzero) digits is 3024000, while the sum is 53.

The square root of 855785069 is about 29253.8043508874. The cubic root of 855785069 is about 949.4124045015.

The spelling of 855785069 in words is "eight hundred fifty-five million, seven hundred eighty-five thousand, sixty-nine".