855349043 has 2 divisors, whose sum is σ = 855349044. Its totient is φ = 855349042.

The previous prime is 855349039. The next prime is 855349063. The reversal of 855349043 is 340943558.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 855349043 - 2² = 855349039 is a prime.

It is a super-2 number, since 2×855349043² = 1463243970722031698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (855349063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427674521 + 427674522.

It is an arithmetic number, because the mean of its divisors is an integer number (427674522).

Almost surely, 2^855349043 is an apocalyptic number.

855349043 is a deficient number, since it is larger than the sum of its proper divisors (1).

855349043 is an equidigital number, since it uses as much as digits as its factorization.

855349043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 41.

The square root of 855349043 is about 29246.3509347748. The cubic root of 855349043 is about 949.2511339386.

The spelling of 855349043 in words is "eight hundred fifty-five million, three hundred forty-nine thousand, forty-three".