856970307 has 16 divisors (see below), whose sum is σ = 1270565280. Its totient is φ = 570872736.

The previous prime is 856970299. The next prime is 856970311. The reversal of 856970307 is 703079658.

It is a happy number.

It is not a de Polignac number, because 856970307 - 2³ = 856970299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (856970327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25513 + ... + 48629.

It is an arithmetic number, because the mean of its divisors is an integer number (79410330).

Almost surely, 2^856970307 is an apocalyptic number.

856970307 is a deficient number, since it is larger than the sum of its proper divisors (413594973).

856970307 is a wasteful number, since it uses less digits than its factorization.

856970307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24499 (or 24493 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 856970307 is about 29274.0551854368. The cubic root of 856970307 is about 949.8505053775.

The spelling of 856970307 in words is "eight hundred fifty-six million, nine hundred seventy thousand, three hundred seven".