9928973 has 4 divisors (see below), whose sum is σ = 9947868. Its totient is φ = 9910080.

The previous prime is 9928943. The next prime is 9928981. The reversal of 9928973 is 3798299.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1646089 + 8282884 = 1283^2 + 2878^2 .

It is a cyclic number.

It is not a de Polignac number, because 9928973 - 2¹⁴ = 9912589 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9928903) 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, 8636 + ... + 9717.

It is an arithmetic number, because the mean of its divisors is an integer number (2486967).

Almost surely, 2^9928973 is an apocalyptic number.

It is an amenable number.

9928973 is a deficient number, since it is larger than the sum of its proper divisors (18895).

9928973 is a wasteful number, since it uses less digits than its factorization.

9928973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18894.

The product of its digits is 244944, while the sum is 47.

The square root of 9928973 is about 3151.0272928047. The cubic root of 9928973 is about 214.9321797987.

It can be divided in two parts, 9928 and 973, that added together give a palindrome (10901).

The spelling of 9928973 in words is "nine million, nine hundred twenty-eight thousand, nine hundred seventy-three".