856356313 has 2 divisors, whose sum is σ = 856356314. Its totient is φ = 856356312.

The previous prime is 856356311. The next prime is 856356323. The reversal of 856356313 is 313653658.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 825297984 + 31058329 = 28728^2 + 5573^2 .

It is a cyclic number.

It is not a de Polignac number, because 856356313 - 2¹ = 856356311 is a prime.

It is a super-2 number, since 2×856356313² = 1466692269629907938, which contains 22 as substring.

Together with 856356311, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (856356311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428178156 + 428178157.

It is an arithmetic number, because the mean of its divisors is an integer number (428178157).

Almost surely, 2^856356313 is an apocalyptic number.

It is an amenable number.

856356313 is a deficient number, since it is larger than the sum of its proper divisors (1).

856356313 is an equidigital number, since it uses as much as digits as its factorization.

856356313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 40.

The square root of 856356313 is about 29263.5663069285. The cubic root of 856356313 is about 949.6236045369.

The spelling of 856356313 in words is "eight hundred fifty-six million, three hundred fifty-six thousand, three hundred thirteen".