856970347 has 2 divisors, whose sum is σ = 856970348. Its totient is φ = 856970346.

The previous prime is 856970341. The next prime is 856970351. The reversal of 856970347 is 743079658.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 856970347 - 2¹⁵ = 856937579 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 856970347.

It is not a weakly prime, because it can be changed into another prime (856970341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428485173 + 428485174.

It is an arithmetic number, because the mean of its divisors is an integer number (428485174).

Almost surely, 2^856970347 is an apocalyptic number.

856970347 is a deficient number, since it is larger than the sum of its proper divisors (1).

856970347 is an equidigital number, since it uses as much as digits as its factorization.

856970347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 49.

The square root of 856970347 is about 29274.0558686356. The cubic root of 856970347 is about 949.8505201560.

The spelling of 856970347 in words is "eight hundred fifty-six million, nine hundred seventy thousand, three hundred forty-seven".