9972981 has 12 divisors (see below), whose sum is σ = 14440608. Its totient is φ = 6632424.

The previous prime is 9972973. The next prime is 9972997. The reversal of 9972981 is 1892799.

9972981 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9972981 - 2³ = 9972973 is a prime.

It is a super-2 number, since 2×9972981² = 198920700052722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9972581) 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, 3426 + ... + 5628.

It is an arithmetic number, because the mean of its divisors is an integer number (1203384).

Almost surely, 2^9972981 is an apocalyptic number.

It is an amenable number.

9972981 is a deficient number, since it is larger than the sum of its proper divisors (4467627).

9972981 is a wasteful number, since it uses less digits than its factorization.

9972981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2712 (or 2709 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 9972981 is about 3158.0026915758. The cubic root of 9972981 is about 215.2492584159.

The spelling of 9972981 in words is "nine million, nine hundred seventy-two thousand, nine hundred eighty-one".