856466339 has 2 divisors, whose sum is σ = 856466340. Its totient is φ = 856466338.

The previous prime is 856466333. The next prime is 856466393. The reversal of 856466339 is 933664658.

Together with next prime (856466393) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 856466339 - 2¹⁶ = 856400803 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (856466333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428233169 + 428233170.

It is an arithmetic number, because the mean of its divisors is an integer number (428233170).

Almost surely, 2^856466339 is an apocalyptic number.

856466339 is a deficient number, since it is larger than the sum of its proper divisors (1).

856466339 is an equidigital number, since it uses as much as digits as its factorization.

856466339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2799360, while the sum is 50.

The square root of 856466339 is about 29265.4461609592. The cubic root of 856466339 is about 949.6642725045.

The spelling of 856466339 in words is "eight hundred fifty-six million, four hundred sixty-six thousand, three hundred thirty-nine".