9981892 has 6 divisors (see below), whose sum is σ = 17468318. Its totient is φ = 4990944.

The previous prime is 9981889. The next prime is 9981899. The reversal of 9981892 is 2981899.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7529536 + 2452356 = 2744^2 + 1566^2 .

It is not an unprimeable number, because it can be changed into a prime (9981899) 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, 1247733 + ... + 1247740.

Almost surely, 2^9981892 is an apocalyptic number.

It is an amenable number.

9981892 is a deficient number, since it is larger than the sum of its proper divisors (7486426).

9981892 is a wasteful number, since it uses less digits than its factorization.

9981892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2495477 (or 2495475 counting only the distinct ones).

The product of its digits is 93312, while the sum is 46.

The square root of 9981892 is about 3159.4132366628. The cubic root of 9981892 is about 215.3133487531.

The spelling of 9981892 in words is "nine million, nine hundred eighty-one thousand, eight hundred ninety-two".