9990239 has 12 divisors (see below), whose sum is σ = 11831664. Its totient is φ = 8262912.

The previous prime is 9990221. The next prime is 9990251. The reversal of 9990239 is 9320999.

9990239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9990239 - 2¹⁶ = 9924703 is a prime.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a d-powerful number, because it can be written as 9 + 9 + 9³ + 0 + 2²³ + 3¹³ + 9⁴ .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9990196 and 9990205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9990209) 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, 5039 + ... + 6735.

It is an arithmetic number, because the mean of its divisors is an integer number (985972).

Almost surely, 2^9990239 is an apocalyptic number.

9990239 is a deficient number, since it is larger than the sum of its proper divisors (1841425).

9990239 is a wasteful number, since it uses less digits than its factorization.

9990239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762 (or 1733 counting only the distinct ones).

The product of its (nonzero) digits is 39366, while the sum is 41.

The square root of 9990239 is about 3160.7339337565. The cubic root of 9990239 is about 215.3733480599.

The spelling of 9990239 in words is "nine million, nine hundred ninety thousand, two hundred thirty-nine".