856746463 has 2 divisors, whose sum is σ = 856746464. Its totient is φ = 856746462.

The previous prime is 856746413. The next prime is 856746523. The reversal of 856746463 is 364647658.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 856746463 - 2²⁹ = 319875551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856746413) 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, 428373231 + 428373232.

It is an arithmetic number, because the mean of its divisors is an integer number (428373232).

Almost surely, 2^856746463 is an apocalyptic number.

856746463 is a deficient number, since it is larger than the sum of its proper divisors (1).

856746463 is an equidigital number, since it uses as much as digits as its factorization.

856746463 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2903040, while the sum is 49.

The square root of 856746463 is about 29270.2316868179. The cubic root of 856746463 is about 949.7677966187.

The spelling of 856746463 in words is "eight hundred fifty-six million, seven hundred forty-six thousand, four hundred sixty-three".