856160191 has 2 divisors, whose sum is σ = 856160192. Its totient is φ = 856160190.

The previous prime is 856160177. The next prime is 856160233. The reversal of 856160191 is 191061658.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 856160191 - 2²⁹ = 319289279 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 856160191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856160111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428080095 + 428080096.

It is an arithmetic number, because the mean of its divisors is an integer number (428080096).

Almost surely, 2^856160191 is an apocalyptic number.

856160191 is a deficient number, since it is larger than the sum of its proper divisors (1).

856160191 is an equidigital number, since it uses as much as digits as its factorization.

856160191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 856160191 is about 29260.2151564202. The cubic root of 856160191 is about 949.5511050033.

The spelling of 856160191 in words is "eight hundred fifty-six million, one hundred sixty thousand, one hundred ninety-one".