9990147 has 12 divisors (see below), whose sum is σ = 13644744. Its totient is φ = 6501600.

The previous prime is 9990137. The next prime is 9990163. The reversal of 9990147 is 7410999.

9990147 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9990147 - 2⁴ = 9990131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9990137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4647 + ... + 6447.

It is an arithmetic number, because the mean of its divisors is an integer number (1137062).

Almost surely, 2^9990147 is an apocalyptic number.

9990147 is a deficient number, since it is larger than the sum of its proper divisors (3654597).

9990147 is a wasteful number, since it uses less digits than its factorization.

9990147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1890 (or 1847 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 39.

The square root of 9990147 is about 3160.7193801412. The cubic root of 9990147 is about 215.3726869342.

The spelling of 9990147 in words is "nine million, nine hundred ninety thousand, one hundred forty-seven".