9990505 has 16 divisors (see below), whose sum is σ = 13754880. Its totient is φ = 6823872.

The previous prime is 9990499. The next prime is 9990551. The reversal of 9990505 is 5050999.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 9990505 - 2⁵ = 9990473 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 13536 + ... + 14254.

It is an arithmetic number, because the mean of its divisors is an integer number (859680).

Almost surely, 2^9990505 is an apocalyptic number.

It is an amenable number.

9990505 is a deficient number, since it is larger than the sum of its proper divisors (3764375).

9990505 is a wasteful number, since it uses less digits than its factorization.

9990505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128.

The product of its (nonzero) digits is 18225, while the sum is 37.

The square root of 9990505 is about 3160.7760123109. The cubic root of 9990505 is about 215.3752595524.

The spelling of 9990505 in words is "nine million, nine hundred ninety thousand, five hundred five".