9899877 has 16 divisors (see below), whose sum is σ = 14278208. Its totient is φ = 6065280.

The previous prime is 9899863. The next prime is 9899887. The reversal of 9899877 is 7789989.

It is a happy number.

It is not a de Polignac number, because 9899877 - 2⁴ = 9899861 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9899887) 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 15 ways as a sum of consecutive naturals, for example, 11802 + ... + 12612.

It is an arithmetic number, because the mean of its divisors is an integer number (892388).

Almost surely, 2^9899877 is an apocalyptic number.

It is an amenable number.

9899877 is a deficient number, since it is larger than the sum of its proper divisors (4378331).

9899877 is a wasteful number, since it uses less digits than its factorization.

9899877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140.

The product of its digits is 2286144, while the sum is 57.

The square root of 9899877 is about 3146.4069984667. The cubic root of 9899877 is about 214.7220276417.

The spelling of 9899877 in words is "nine million, eight hundred ninety-nine thousand, eight hundred seventy-seven".