9989003025 has 45 divisors (see below), whose sum is σ = 18511421313. Its totient is φ = 5325069600.

The previous prime is 9989003023. The next prime is 9989003051. The reversal of 9989003025 is 5203009899.

The square root of 9989003025 is 99945.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 16184529 + 9972818496 = 4023^2 + 99864^2 .

It is a tau number, because it is divible by the number of its divisors (45).

It is not a de Polignac number, because 9989003025 - 2¹ = 9989003023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9989003023) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 4496415 + ... + 4498635.

Almost surely, 2^9989003025 is an apocalyptic number.

9989003025 is the 99945-th square number.

9989003025 is the 49973-rd centered octagonal number.

It is an amenable number.

9989003025 is a deficient number, since it is larger than the sum of its proper divisors (8522418288).

9989003025 is an frugal number, since it uses more digits than its factorization.

9989003025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4464 (or 2229 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The cubic root of 9989003025 is about 2153.6446582149.

The spelling of 9989003025 in words is "nine billion, nine hundred eighty-nine million, three thousand, twenty-five".