285726229 has 2 divisors, whose sum is σ = 285726230. Its totient is φ = 285726228.

The previous prime is 285726227. The next prime is 285726317. The reversal of 285726229 is 922627582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 236698225 + 49028004 = 15385^2 + 7002^2 .

It is a cyclic number.

It is not a de Polignac number, because 285726229 - 2¹ = 285726227 is a prime.

Together with 285726227, 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 (285726227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142863114 + 142863115.

It is an arithmetic number, because the mean of its divisors is an integer number (142863115).

Almost surely, 2^285726229 is an apocalyptic number.

It is an amenable number.

285726229 is a deficient number, since it is larger than the sum of its proper divisors (1).

285726229 is an equidigital number, since it uses as much as digits as its factorization.

285726229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 43.

The square root of 285726229 is about 16903.4383780342. The cubic root of 285726229 is about 658.6429331735.

The spelling of 285726229 in words is "two hundred eighty-five million, seven hundred twenty-six thousand, two hundred twenty-nine".