855089 has 2 divisors, whose sum is σ = 855090. Its totient is φ = 855088.

The previous prime is 855079. The next prime is 855119. The reversal of 855089 is 980558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 824464 + 30625 = 908^2 + 175^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-855089 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (855059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427544 + 427545.

It is an arithmetic number, because the mean of its divisors is an integer number (427545).

2⁸⁵⁵⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

855089 is a deficient number, since it is larger than the sum of its proper divisors (1).

855089 is an equidigital number, since it uses as much as digits as its factorization.

855089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 35.

The square root of 855089 is about 924.7102248813. The cubic root of 855089 is about 94.9154927158.

The spelling of 855089 in words is "eight hundred fifty-five thousand, eighty-nine".