9986869 has 4 divisors (see below), whose sum is σ = 9993280. Its totient is φ = 9980460.

The previous prime is 9986863. The next prime is 9986881. The reversal of 9986869 is 9686899.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9686899 = 29 ⋅334031.

It is a cyclic number.

It is not a de Polignac number, because 9986869 - 2³ = 9986861 is a prime.

It is a super-2 number, since 2×9986869² = 199475104846322, which contains 22 as substring.

It is a Duffinian number.

9986869 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9986861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 802 + ... + 4540.

It is an arithmetic number, because the mean of its divisors is an integer number (2498320).

Almost surely, 2^9986869 is an apocalyptic number.

It is an amenable number.

9986869 is a deficient number, since it is larger than the sum of its proper divisors (6411).

9986869 is a wasteful number, since it uses less digits than its factorization.

9986869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6410.

The product of its digits is 1679616, while the sum is 55.

The square root of 9986869 is about 3160.2007847604. The cubic root of 9986869 is about 215.3491280917.

It can be divided in two parts, 99 and 86869, that added together give a palindrome (86968).

The spelling of 9986869 in words is "nine million, nine hundred eighty-six thousand, eight hundred sixty-nine".