9899239 has 12 divisors (see below), whose sum is σ = 11638704. Its totient is φ = 8247744.

The previous prime is 9899221. The next prime is 9899257. The reversal of 9899239 is 9329989.

It is an interprime number because it is at equal distance from previous prime (9899221) and next prime (9899257).

It is a de Polignac number, because none of the positive numbers 2^k-9899239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9899192 and 9899201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9890239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9067 + ... + 10099.

It is an arithmetic number, because the mean of its divisors is an integer number (969892).

Almost surely, 2^9899239 is an apocalyptic number.

9899239 is a deficient number, since it is larger than the sum of its proper divisors (1739465).

9899239 is a wasteful number, since it uses less digits than its factorization.

9899239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114 (or 1077 counting only the distinct ones).

The product of its digits is 314928, while the sum is 49.

The square root of 9899239 is about 3146.3056113480. The cubic root of 9899239 is about 214.7174149380.

The spelling of 9899239 in words is "nine million, eight hundred ninety-nine thousand, two hundred thirty-nine".