985662553 has 2 divisors, whose sum is σ = 985662554. Its totient is φ = 985662552.

The previous prime is 985662547. The next prime is 985662569. The reversal of 985662553 is 355266589.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 731323849 + 254338704 = 27043^2 + 15948^2 .

It is an emirp because it is prime and its reverse (355266589) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-985662553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 985662497 and 985662506.

It is not a weakly prime, because it can be changed into another prime (985662523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492831276 + 492831277.

It is an arithmetic number, because the mean of its divisors is an integer number (492831277).

Almost surely, 2^985662553 is an apocalyptic number.

It is an amenable number.

985662553 is a deficient number, since it is larger than the sum of its proper divisors (1).

985662553 is an equidigital number, since it uses as much as digits as its factorization.

985662553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944000, while the sum is 49.

The square root of 985662553 is about 31395.2632255250. The cubic root of 985662553 is about 995.1978270490.

The spelling of 985662553 in words is "nine hundred eighty-five million, six hundred sixty-two thousand, five hundred fifty-three".