856887463 has 2 divisors, whose sum is σ = 856887464. Its totient is φ = 856887462.

The previous prime is 856887457. The next prime is 856887467. The reversal of 856887463 is 364788658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 856887463 - 2⁹ = 856886951 is a prime.

It is a super-2 number, since 2×856887463² = 1468512248493152738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856887467) 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, 428443731 + 428443732.

It is an arithmetic number, because the mean of its divisors is an integer number (428443732).

Almost surely, 2^856887463 is an apocalyptic number.

856887463 is a deficient number, since it is larger than the sum of its proper divisors (1).

856887463 is an equidigital number, since it uses as much as digits as its factorization.

856887463 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7741440, while the sum is 55.

The square root of 856887463 is about 29272.6401781595. The cubic root of 856887463 is about 949.8198967904.

The spelling of 856887463 in words is "eight hundred fifty-six million, eight hundred eighty-seven thousand, four hundred sixty-three".