229985839 has 2 divisors, whose sum is σ = 229985840. Its totient is φ = 229985838.

The previous prime is 229985837. The next prime is 229985867. The reversal of 229985839 is 938589922.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 229985839 - 2¹ = 229985837 is a prime.

It is a super-2 number, since 2×229985839² = 105786972281067842, which contains 22 as substring.

Together with 229985837, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 229985839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (229985837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114992919 + 114992920.

It is an arithmetic number, because the mean of its divisors is an integer number (114992920).

Almost surely, 2^229985839 is an apocalyptic number.

229985839 is a deficient number, since it is larger than the sum of its proper divisors (1).

229985839 is an equidigital number, since it uses as much as digits as its factorization.

229985839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 55.

The square root of 229985839 is about 15165.2840065724. The cubic root of 229985839 is about 612.6799928598.

The spelling of 229985839 in words is "two hundred twenty-nine million, nine hundred eighty-five thousand, eight hundred thirty-nine".