285244189 has 2 divisors, whose sum is σ = 285244190. Its totient is φ = 285244188.

The previous prime is 285244187. The next prime is 285244213. The reversal of 285244189 is 981442582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 232318564 + 52925625 = 15242^2 + 7275^2 .

It is a cyclic number.

It is not a de Polignac number, because 285244189 - 2¹ = 285244187 is a prime.

Together with 285244187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285244187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142622094 + 142622095.

It is an arithmetic number, because the mean of its divisors is an integer number (142622095).

Almost surely, 2^285244189 is an apocalyptic number.

It is an amenable number.

285244189 is a deficient number, since it is larger than the sum of its proper divisors (1).

285244189 is an equidigital number, since it uses as much as digits as its factorization.

285244189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 184320, while the sum is 43.

The square root of 285244189 is about 16889.1737216478. The cubic root of 285244189 is about 658.2723325558.

The spelling of 285244189 in words is "two hundred eighty-five million, two hundred forty-four thousand, one hundred eighty-nine".