855144133 has 2 divisors, whose sum is σ = 855144134. Its totient is φ = 855144132.

The previous prime is 855144109. The next prime is 855144161. The reversal of 855144133 is 331441558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 661878529 + 193265604 = 25727^2 + 13902^2 .

It is a cyclic number.

It is not a de Polignac number, because 855144133 - 2²¹ = 853046981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855144733) 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, 427572066 + 427572067.

It is an arithmetic number, because the mean of its divisors is an integer number (427572067).

Almost surely, 2^855144133 is an apocalyptic number.

It is an amenable number.

855144133 is a deficient number, since it is larger than the sum of its proper divisors (1).

855144133 is an equidigital number, since it uses as much as digits as its factorization.

855144133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28800, while the sum is 34.

The square root of 855144133 is about 29242.8475528632. The cubic root of 855144133 is about 949.1753260619.

The spelling of 855144133 in words is "eight hundred fifty-five million, one hundred forty-four thousand, one hundred thirty-three".