985771601 has 2 divisors, whose sum is σ = 985771602. Its totient is φ = 985771600.

The previous prime is 985771583. The next prime is 985771607. The reversal of 985771601 is 106177589.

985771601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 977500225 + 8271376 = 31265^2 + 2876^2 .

It is a cyclic number.

It is not a de Polignac number, because 985771601 - 2²⁶ = 918662737 is a prime.

It is not a weakly prime, because it can be changed into another prime (985771607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492885800 + 492885801.

It is an arithmetic number, because the mean of its divisors is an integer number (492885801).

Almost surely, 2^985771601 is an apocalyptic number.

It is an amenable number.

985771601 is a deficient number, since it is larger than the sum of its proper divisors (1).

985771601 is an equidigital number, since it uses as much as digits as its factorization.

985771601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 44.

The square root of 985771601 is about 31396.9998725993. Note that the first 3 decimals coincide. The cubic root of 985771601 is about 995.2345266715.

The spelling of 985771601 in words is "nine hundred eighty-five million, seven hundred seventy-one thousand, six hundred one".