855859983 has 12 divisors (see below), whose sum is σ = 1254318744. Its totient is φ = 518702800.

The previous prime is 855859981. The next prime is 855860017. The reversal of 855859983 is 389958558.

It is not a de Polignac number, because 855859983 - 2¹ = 855859981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855859981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1178508 + ... + 1179233.

It is an arithmetic number, because the mean of its divisors is an integer number (104526562).

Almost surely, 2^855859983 is an apocalyptic number.

855859983 is a deficient number, since it is larger than the sum of its proper divisors (398458761).

855859983 is a wasteful number, since it uses less digits than its factorization.

855859983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2357766 (or 2357755 counting only the distinct ones).

The product of its digits is 15552000, while the sum is 60.

The square root of 855859983 is about 29255.0847375290. The cubic root of 855859983 is about 949.4401070202.

The spelling of 855859983 in words is "eight hundred fifty-five million, eight hundred fifty-nine thousand, nine hundred eighty-three".