856746313 has 2 divisors, whose sum is σ = 856746314. Its totient is φ = 856746312.

The previous prime is 856746283. The next prime is 856746361. The reversal of 856746313 is 313647658.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 609250489 + 247495824 = 24683^2 + 15732^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-856746313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 856746313.

It is not a weakly prime, because it can be changed into another prime (856746013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428373156 + 428373157.

It is an arithmetic number, because the mean of its divisors is an integer number (428373157).

Almost surely, 2^856746313 is an apocalyptic number.

It is an amenable number.

856746313 is a deficient number, since it is larger than the sum of its proper divisors (1).

856746313 is an equidigital number, since it uses as much as digits as its factorization.

856746313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 43.

The square root of 856746313 is about 29270.2291244876. The cubic root of 856746313 is about 949.7677411899.

The spelling of 856746313 in words is "eight hundred fifty-six million, seven hundred forty-six thousand, three hundred thirteen".