9900500 has 24 divisors (see below), whose sum is σ = 21623784. Its totient is φ = 3960000.

The previous prime is 9900493. The next prime is 9900509. The reversal of 9900500 is 50099.

It can be written as a sum of positive squares in 4 ways, for example, as 3161284 + 6739216 = 1778^2 + 2596^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9900509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9401 + ... + 10400.

It is an arithmetic number, because the mean of its divisors is an integer number (900991).

Almost surely, 2^9900500 is an apocalyptic number.

It is an amenable number.

9900500 is an abundant number, since it is smaller than the sum of its proper divisors (11723284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9900500 is a wasteful number, since it uses less digits than its factorization.

9900500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19820 (or 19808 counting only the distinct ones).

The product of its (nonzero) digits is 405, while the sum is 23.

The square root of 9900500 is about 3146.5059987230. The cubic root of 9900500 is about 214.7265317050.

Adding to 9900500 its reverse (50099), we get a palindrome (9950599).

The spelling of 9900500 in words is "nine million, nine hundred thousand, five hundred".