856848361 has 2 divisors, whose sum is σ = 856848362. Its totient is φ = 856848360.

The previous prime is 856848353. The next prime is 856848367. The reversal of 856848361 is 163848658.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 841000000 + 15848361 = 29000^2 + 3981^2 .

It is a cyclic number.

It is not a de Polignac number, because 856848361 - 2³ = 856848353 is a prime.

It is a super-2 number, since 2×856848361² = 1468378227496772642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (856848367) 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, 428424180 + 428424181.

It is an arithmetic number, because the mean of its divisors is an integer number (428424181).

Almost surely, 2^856848361 is an apocalyptic number.

It is an amenable number.

856848361 is a deficient number, since it is larger than the sum of its proper divisors (1).

856848361 is an equidigital number, since it uses as much as digits as its factorization.

856848361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1105920, while the sum is 49.

The square root of 856848361 is about 29271.9722772484. The cubic root of 856848361 is about 949.8054489878.

The spelling of 856848361 in words is "eight hundred fifty-six million, eight hundred forty-eight thousand, three hundred sixty-one".