9872668981 has 8 divisors (see below), whose sum is σ = 11283657984. Its totient is φ = 8461831920.

The previous prime is 9872668973. The next prime is 9872668991. The reversal of 9872668981 is 1898662789.

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

It is a cyclic number.

It is not a de Polignac number, because 9872668981 - 2³ = 9872668973 is a prime.

It is a super-2 number, since 2×9872668981² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9872668951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204291 + ... + 247951.

It is an arithmetic number, because the mean of its divisors is an integer number (1410457248).

Almost surely, 2^9872668981 is an apocalyptic number.

It is an amenable number.

9872668981 is a deficient number, since it is larger than the sum of its proper divisors (1410989003).

9872668981 is a wasteful number, since it uses less digits than its factorization.

9872668981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75971.

The product of its digits is 20901888, while the sum is 64.

The square root of 9872668981 is about 99361.3052500821. The cubic root of 9872668981 is about 2145.2513895862.

The spelling of 9872668981 in words is "nine billion, eight hundred seventy-two million, six hundred sixty-eight thousand, nine hundred eighty-one".