9981047 has 4 divisors (see below), whose sum is σ = 9991200. Its totient is φ = 9970896.

The previous prime is 9981043. The next prime is 9981053. The reversal of 9981047 is 7401899.

9981047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 9981047 - 2² = 9981043 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9981047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9981043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3422 + ... + 5627.

It is an arithmetic number, because the mean of its divisors is an integer number (2497800).

Almost surely, 2^9981047 is an apocalyptic number.

9981047 is a deficient number, since it is larger than the sum of its proper divisors (10153).

9981047 is a wasteful number, since it uses less digits than its factorization.

9981047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10152.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 9981047 is about 3159.2795064698. The cubic root of 9981047 is about 215.3072729205.

The spelling of 9981047 in words is "nine million, nine hundred eighty-one thousand, forty-seven".