9999530 has 8 divisors (see below), whose sum is σ = 17999172. Its totient is φ = 3999808.

The previous prime is 9999511. The next prime is 9999533. The reversal of 9999530 is 359999.

It can be written as a sum of positive squares in 2 ways, for example, as 9223369 + 776161 = 3037^2 + 881^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9999533) 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, 499967 + ... + 499986.

Almost surely, 2^9999530 is an apocalyptic number.

9999530 is a deficient number, since it is larger than the sum of its proper divisors (7999642).

9999530 is a wasteful number, since it uses less digits than its factorization.

9999530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999960.

The product of its (nonzero) digits is 98415, while the sum is 44.

The square root of 9999530 is about 3162.2033457702. The cubic root of 9999530 is about 215.4400936693.

The spelling of 9999530 in words is "nine million, nine hundred ninety-nine thousand, five hundred thirty".