855229189 has 2 divisors, whose sum is σ = 855229190. Its totient is φ = 855229188.

The previous prime is 855229129. The next prime is 855229259. The reversal of 855229189 is 981922558.

855229189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 485320900 + 369908289 = 22030^2 + 19233^2 .

It is a cyclic number.

It is not a de Polignac number, because 855229189 - 2²¹ = 853132037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855229129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427614594 + 427614595.

It is an arithmetic number, because the mean of its divisors is an integer number (427614595).

Almost surely, 2^855229189 is an apocalyptic number.

It is an amenable number.

855229189 is a deficient number, since it is larger than the sum of its proper divisors (1).

855229189 is an equidigital number, since it uses as much as digits as its factorization.

855229189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 518400, while the sum is 49.

The square root of 855229189 is about 29244.3018210386. The cubic root of 855229189 is about 949.2067945894.

The spelling of 855229189 in words is "eight hundred fifty-five million, two hundred twenty-nine thousand, one hundred eighty-nine".