985576909 has 2 divisors, whose sum is σ = 985576910. Its totient is φ = 985576908.

The previous prime is 985576883. The next prime is 985576927. The reversal of 985576909 is 909675589.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 949995684 + 35581225 = 30822^2 + 5965^2 .

It is a cyclic number.

It is not a de Polignac number, because 985576909 - 2⁵ = 985576877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (985576609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492788454 + 492788455.

It is an arithmetic number, because the mean of its divisors is an integer number (492788455).

Almost surely, 2^985576909 is an apocalyptic number.

It is an amenable number.

985576909 is a deficient number, since it is larger than the sum of its proper divisors (1).

985576909 is an equidigital number, since it uses as much as digits as its factorization.

985576909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6123600, while the sum is 58.

The square root of 985576909 is about 31393.8992321757. The cubic root of 985576909 is about 995.1690020415.

The spelling of 985576909 in words is "nine hundred eighty-five million, five hundred seventy-six thousand, nine hundred nine".