9981893942 has 8 divisors (see below), whose sum is σ = 15020986032. Its totient is φ = 4974898600.

The previous prime is 9981893939. The next prime is 9981893951. The reversal of 9981893942 is 2493981899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8023409 + ... + 8024652.

It is an arithmetic number, because the mean of its divisors is an integer number (1877623254).

Almost surely, 2^9981893942 is an apocalyptic number.

9981893942 is a deficient number, since it is larger than the sum of its proper divisors (5039092090).

9981893942 is a wasteful number, since it uses less digits than its factorization.

9981893942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16048374.

The product of its digits is 10077696, while the sum is 62.

The square root of 9981893942 is about 99909.4286941928. The cubic root of 9981893942 is about 2153.1336271632.

The spelling of 9981893942 in words is "nine billion, nine hundred eighty-one million, eight hundred ninety-three thousand, nine hundred forty-two".