9981973892 has 36 divisors (see below), whose sum is σ = 19271968128. Its totient is φ = 4520458800.

The previous prime is 9981973891. The next prime is 9981973907. The reversal of 9981973892 is 2983791899.

It is not an unprimeable number, because it can be changed into a prime (9981973891) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93113 + ... + 169215.

It is an arithmetic number, because the mean of its divisors is an integer number (535332448).

Almost surely, 2^9981973892 is an apocalyptic number.

It is an amenable number.

9981973892 is a deficient number, since it is larger than the sum of its proper divisors (9289994236).

9981973892 is a wasteful number, since it uses less digits than its factorization.

9981973892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76400 (or 76387 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 65.

The square root of 9981973892 is about 99909.8288057787. The cubic root of 9981973892 is about 2153.1393756572.

The spelling of 9981973892 in words is "nine billion, nine hundred eighty-one million, nine hundred seventy-three thousand, eight hundred ninety-two".