280085089 has 2 divisors, whose sum is σ = 280085090. Its totient is φ = 280085088.

The previous prime is 280085087. The next prime is 280085147. The reversal of 280085089 is 980580082.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 230523489 + 49561600 = 15183^2 + 7040^2 .

It is a cyclic number.

It is not a de Polignac number, because 280085089 - 2¹ = 280085087 is a prime.

Together with 280085087, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (280085087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140042544 + 140042545.

It is an arithmetic number, because the mean of its divisors is an integer number (140042545).

Almost surely, 2^280085089 is an apocalyptic number.

It is an amenable number.

280085089 is a deficient number, since it is larger than the sum of its proper divisors (1).

280085089 is an equidigital number, since it uses as much as digits as its factorization.

280085089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 280085089 is about 16735.7428577282. The cubic root of 280085089 is about 654.2795247930.

The spelling of 280085089 in words is "two hundred eighty million, eighty-five thousand, eighty-nine".