985520449 has 3 divisors (see below), whose sum is σ = 985551843. Its totient is φ = 985489056.

The previous prime is 985520383. The next prime is 985520461. The reversal of 985520449 is 944025589.

The square root of 985520449 is 31393.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 977500225 + 8020224 = 31265^2 + 2832^2 .

It is a de Polignac number, because none of the positive numbers 2^k-985520449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 985520399 and 985520408.

It is not an unprimeable number, because it can be changed into a prime (985520149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 15697 + ... + 47089.

It is an arithmetic number, because the mean of its divisors is an integer number (328517281).

Almost surely, 2^985520449 is an apocalyptic number.

985520449 is the 31393-rd square number.

985520449 is the 15697-th centered octagonal number.

It is an amenable number.

985520449 is a deficient number, since it is larger than the sum of its proper divisors (31394).

985520449 is an frugal number, since it uses more digits than its factorization.

985520449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62786 (or 31393 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 46.

The cubic root of 985520449 is about 995.1499985137.

Multiplying 985520449 by its product of nonzero digits (518400), we get a square (510893800761600 = 22602960²).

The spelling of 985520449 in words is "nine hundred eighty-five million, five hundred twenty thousand, four hundred forty-nine".