9918573 has 16 divisors (see below), whose sum is σ = 15237120. Its totient is φ = 5621616.

The previous prime is 9918563. The next prime is 9918593. The reversal of 9918573 is 3758199.

It is a happy number.

It is not a de Polignac number, because 9918573 - 2⁸ = 9918317 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9918523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 808 + ... + 4526.

It is an arithmetic number, because the mean of its divisors is an integer number (952320).

Almost surely, 2^9918573 is an apocalyptic number.

It is an amenable number.

9918573 is a deficient number, since it is larger than the sum of its proper divisors (5318547).

9918573 is a wasteful number, since it uses less digits than its factorization.

9918573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3856.

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

The square root of 9918573 is about 3149.3766049807. The cubic root of 9918573 is about 214.8571107535.

The spelling of 9918573 in words is "nine million, nine hundred eighteen thousand, five hundred seventy-three".