9990507 has 4 divisors (see below), whose sum is σ = 13320680. Its totient is φ = 6660336.

The previous prime is 9990499. The next prime is 9990551. The reversal of 9990507 is 7050999.

9990507 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7050999 = 3 ⋅2350333.

It is not a de Polignac number, because 9990507 - 2³ = 9990499 is a prime.

It is a Duffinian number.

9990507 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9990557) 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, 1665082 + ... + 1665087.

It is an arithmetic number, because the mean of its divisors is an integer number (3330170).

Almost surely, 2^9990507 is an apocalyptic number.

9990507 is a deficient number, since it is larger than the sum of its proper divisors (3330173).

9990507 is a wasteful number, since it uses less digits than its factorization.

9990507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3330172.

The product of its (nonzero) digits is 25515, while the sum is 39.

The square root of 9990507 is about 3160.7763286889. The cubic root of 9990507 is about 215.3752739244.

The spelling of 9990507 in words is "nine million, nine hundred ninety thousand, five hundred seven".