855947 has 2 divisors, whose sum is σ = 855948. Its totient is φ = 855946.

The previous prime is 855937. The next prime is 855983. The reversal of 855947 is 749558.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 855947 - 2¹⁰ = 854923 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 855947.

It is not a weakly prime, because it can be changed into another prime (855937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427973 + 427974.

It is an arithmetic number, because the mean of its divisors is an integer number (427974).

2⁸⁵⁵⁹⁴⁷ is an apocalyptic number.

855947 is a deficient number, since it is larger than the sum of its proper divisors (1).

855947 is an equidigital number, since it uses as much as digits as its factorization.

855947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 38.

The square root of 855947 is about 925.1740376816. The cubic root of 855947 is about 94.9472283089.

It can be divided in two parts, 8 and 55947, that added together give a palindrome (55955).

The spelling of 855947 in words is "eight hundred fifty-five thousand, nine hundred forty-seven".