9990609 has 8 divisors (see below), whose sum is σ = 13353312. Its totient is φ = 6644160.

The previous prime is 9990569. The next prime is 9990653. The reversal of 9990609 is 9060999.

9990609 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-9990609 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (9990689) 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, 2547 + ... + 5144.

It is an arithmetic number, because the mean of its divisors is an integer number (1669164).

Almost surely, 2^9990609 is an apocalyptic number.

It is an amenable number.

9990609 is a deficient number, since it is larger than the sum of its proper divisors (3362703).

9990609 is a wasteful number, since it uses less digits than its factorization.

9990609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8127.

The product of its (nonzero) digits is 39366, while the sum is 42.

The square root of 9990609 is about 3160.7924639242. The cubic root of 9990609 is about 215.3760068936.

The spelling of 9990609 in words is "nine million, nine hundred ninety thousand, six hundred nine".