856085971 has 8 divisors (see below), whose sum is σ = 922166784. Its totient is φ = 790037760.

The previous prime is 856085969. The next prime is 856085981. The reversal of 856085971 is 179580658.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 856085971 - 2¹ = 856085969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (856085911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92526 + ... + 101356.

It is an arithmetic number, because the mean of its divisors is an integer number (115270848).

Almost surely, 2^856085971 is an apocalyptic number.

856085971 is a deficient number, since it is larger than the sum of its proper divisors (66080813).

856085971 is a wasteful number, since it uses less digits than its factorization.

856085971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16301.

The product of its (nonzero) digits is 604800, while the sum is 49.

The square root of 856085971 is about 29258.9468539112. The cubic root of 856085971 is about 949.5236655434.

The spelling of 856085971 in words is "eight hundred fifty-six million, eighty-five thousand, nine hundred seventy-one".