285223849 has 2 divisors, whose sum is σ = 285223850. Its totient is φ = 285223848.

The previous prime is 285223823. The next prime is 285223879. The reversal of 285223849 is 948322582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 229825600 + 55398249 = 15160^2 + 7443^2 .

It is a cyclic number.

It is not a de Polignac number, because 285223849 - 2⁵ = 285223817 is a prime.

It is a super-3 number, since 3×285223849³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (285223879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142611924 + 142611925.

It is an arithmetic number, because the mean of its divisors is an integer number (142611925).

Almost surely, 2^285223849 is an apocalyptic number.

It is an amenable number.

285223849 is a deficient number, since it is larger than the sum of its proper divisors (1).

285223849 is an equidigital number, since it uses as much as digits as its factorization.

285223849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 276480, while the sum is 43.

The square root of 285223849 is about 16888.5715500157. The cubic root of 285223849 is about 658.2566856376.

The spelling of 285223849 in words is "two hundred eighty-five million, two hundred twenty-three thousand, eight hundred forty-nine".