9988169 has 16 divisors (see below), whose sum is σ = 10813440. Its totient is φ = 9208080.

The previous prime is 9988157. The next prime is 9988171. The reversal of 9988169 is 9618899.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9988169 is a prime.

It is a super-2 number, since 2×9988169² = 199527039945122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9988109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78584 + ... + 78710.

It is an arithmetic number, because the mean of its divisors is an integer number (675840).

Almost surely, 2^9988169 is an apocalyptic number.

It is an amenable number.

9988169 is a deficient number, since it is larger than the sum of its proper divisors (825271).

9988169 is a wasteful number, since it uses less digits than its factorization.

9988169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260.

The product of its digits is 279936, while the sum is 50.

The square root of 9988169 is about 3160.4064612008. The cubic root of 9988169 is about 215.3584717516.

The spelling of 9988169 in words is "nine million, nine hundred eighty-eight thousand, one hundred sixty-nine".