856462687 has 2 divisors, whose sum is σ = 856462688. Its totient is φ = 856462686.

The previous prime is 856462681. The next prime is 856462721. The reversal of 856462687 is 786264658.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 856462687 - 2¹⁵ = 856429919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856462681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428231343 + 428231344.

It is an arithmetic number, because the mean of its divisors is an integer number (428231344).

Almost surely, 2^856462687 is an apocalyptic number.

856462687 is a deficient number, since it is larger than the sum of its proper divisors (1).

856462687 is an equidigital number, since it uses as much as digits as its factorization.

856462687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3870720, while the sum is 52.

The square root of 856462687 is about 29265.3837664911. The cubic root of 856462687 is about 949.6629227029.

The spelling of 856462687 in words is "eight hundred fifty-six million, four hundred sixty-two thousand, six hundred eighty-seven".