985527289 has 2 divisors, whose sum is σ = 985527290. Its totient is φ = 985527288.

The previous prime is 985527269. The next prime is 985527317. The reversal of 985527289 is 982725589.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 951105600 + 34421689 = 30840^2 + 5867^2 .

It is an emirp because it is prime and its reverse (982725589) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 985527289 - 2¹³ = 985519097 is a prime.

It is not a weakly prime, because it can be changed into another prime (985527259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492763644 + 492763645.

It is an arithmetic number, because the mean of its divisors is an integer number (492763645).

Almost surely, 2^985527289 is an apocalyptic number.

It is an amenable number.

985527289 is a deficient number, since it is larger than the sum of its proper divisors (1).

985527289 is an equidigital number, since it uses as much as digits as its factorization.

985527289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3628800, while the sum is 55.

The square root of 985527289 is about 31393.1089412947. The cubic root of 985527289 is about 995.1523007863.

The spelling of 985527289 in words is "nine hundred eighty-five million, five hundred twenty-seven thousand, two hundred eighty-nine".