9879899 has 4 divisors (see below), whose sum is σ = 9922536. Its totient is φ = 9837264.

The previous prime is 9879871. The next prime is 9879901. The reversal of 9879899 is 9989789.

9879899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9989789 = 383 ⋅26083.

It is a cyclic number.

It is not a de Polignac number, because 9879899 - 2⁸ = 9879643 is a prime.

It is a super-2 number, since 2×9879899² = 195224808500402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9879299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20969 + ... + 21434.

It is an arithmetic number, because the mean of its divisors is an integer number (2480634).

Almost surely, 2^9879899 is an apocalyptic number.

9879899 is a deficient number, since it is larger than the sum of its proper divisors (42637).

9879899 is a wasteful number, since it uses less digits than its factorization.

9879899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42636.

The product of its digits is 2939328, while the sum is 59.

The square root of 9879899 is about 3143.2306628690. The cubic root of 9879899 is about 214.5774936755.

It can be divided in two parts, 98 and 79899, that added together give a palindrome (79997).

The spelling of 9879899 in words is "nine million, eight hundred seventy-nine thousand, eight hundred ninety-nine".