9981573 has 16 divisors (see below), whose sum is σ = 15582336. Its totient is φ = 5564160.

The previous prime is 9981557. The next prime is 9981599. The reversal of 9981573 is 3751899.

It is a happy number.

It is not a de Polignac number, because 9981573 - 2⁴ = 9981557 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9981073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4936 + ... + 6657.

It is an arithmetic number, because the mean of its divisors is an integer number (973896).

Almost surely, 2^9981573 is an apocalyptic number.

It is an amenable number.

9981573 is a deficient number, since it is larger than the sum of its proper divisors (5600763).

9981573 is a wasteful number, since it uses less digits than its factorization.

9981573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11644.

The product of its digits is 68040, while the sum is 42.

The square root of 9981573 is about 3159.3627522018. The cubic root of 9981573 is about 215.3110550767.

The spelling of 9981573 in words is "nine million, nine hundred eighty-one thousand, five hundred seventy-three".