9906529 has 4 divisors (see below), whose sum is σ = 10489284. Its totient is φ = 9323776.

The previous prime is 9906527. The next prime is 9906569. The reversal of 9906529 is 9256099.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5382400 + 4524129 = 2320^2 + 2127^2 .

It is a cyclic number.

It is not a de Polignac number, because 9906529 - 2¹ = 9906527 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

9906529 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 9906491 and 9906500.

It is not an unprimeable number, because it can be changed into a prime (9906527) 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 3 ways as a sum of consecutive naturals, for example, 291352 + ... + 291385.

It is an arithmetic number, because the mean of its divisors is an integer number (2622321).

Almost surely, 2^9906529 is an apocalyptic number.

It is an amenable number.

9906529 is a deficient number, since it is larger than the sum of its proper divisors (582755).

9906529 is a wasteful number, since it uses less digits than its factorization.

9906529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582754.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 9906529 is about 3147.4638997135. The cubic root of 9906529 is about 214.7701094221.

The spelling of 9906529 in words is "nine million, nine hundred six thousand, five hundred twenty-nine".