985769231 has 2 divisors, whose sum is σ = 985769232. Its totient is φ = 985769230.

The previous prime is 985769221. The next prime is 985769243. The reversal of 985769231 is 132967589.

985769231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (132967589) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 985769231 - 2¹⁴ = 985752847 is a prime.

It is a super-2 number, since 2×985769231² = 1943481953572662722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 985769231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (985769221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492884615 + 492884616.

It is an arithmetic number, because the mean of its divisors is an integer number (492884616).

Almost surely, 2^985769231 is an apocalyptic number.

985769231 is a deficient number, since it is larger than the sum of its proper divisors (1).

985769231 is an equidigital number, since it uses as much as digits as its factorization.

985769231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 50.

The square root of 985769231 is about 31396.9621301170. The cubic root of 985769231 is about 995.2337290872.

The spelling of 985769231 in words is "nine hundred eighty-five million, seven hundred sixty-nine thousand, two hundred thirty-one".