855455389 has 2 divisors, whose sum is σ = 855455390. Its totient is φ = 855455388.

The previous prime is 855455333. The next prime is 855455407. The reversal of 855455389 is 983554558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 727380900 + 128074489 = 26970^2 + 11317^2 .

It is a cyclic number.

It is not a de Polignac number, because 855455389 - 2⁹ = 855454877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855455089) 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, 427727694 + 427727695.

It is an arithmetic number, because the mean of its divisors is an integer number (427727695).

Almost surely, 2^855455389 is an apocalyptic number.

It is an amenable number.

855455389 is a deficient number, since it is larger than the sum of its proper divisors (1).

855455389 is an equidigital number, since it uses as much as digits as its factorization.

855455389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320000, while the sum is 52.

The square root of 855455389 is about 29248.1689854254. The cubic root of 855455389 is about 949.2904726073.

The spelling of 855455389 in words is "eight hundred fifty-five million, four hundred fifty-five thousand, three hundred eighty-nine".