985394881 has 3 divisors (see below), whose sum is σ = 985426273. Its totient is φ = 985363490.

The previous prime is 985394863. The next prime is 985394897. The reversal of 985394881 is 188493589.

The square root of 985394881 is 31391.

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, and also an emirpimes, since its reverse is a distinct semiprime: 188493589 = 317 ⋅594617.

It is not a de Polignac number, because 985394881 - 2²¹ = 983297729 is a prime.

It is a super-2 number, since 2×985394881² = 1942006143002008322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (985394381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 15696 + ... + 47086.

Almost surely, 2^985394881 is an apocalyptic number.

985394881 is the 31391-st square number.

985394881 is the 15696-th centered octagonal number.

It is an amenable number.

985394881 is a deficient number, since it is larger than the sum of its proper divisors (31392).

985394881 is an frugal number, since it uses more digits than its factorization.

985394881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62782 (or 31391 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 55.

The cubic root of 985394881 is about 995.1077317423.

The spelling of 985394881 in words is "nine hundred eighty-five million, three hundred ninety-four thousand, eight hundred eighty-one".