9959887 has 12 divisors (see below), whose sum is σ = 11660376. Its totient is φ = 8482320.

The previous prime is 9959879. The next prime is 9959899. The reversal of 9959887 is 7889599.

It is not a de Polignac number, because 9959887 - 2³ = 9959879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9959827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8308 + ... + 9430.

It is an arithmetic number, because the mean of its divisors is an integer number (971698).

Almost surely, 2^9959887 is an apocalyptic number.

9959887 is a deficient number, since it is larger than the sum of its proper divisors (1700489).

9959887 is a wasteful number, since it uses less digits than its factorization.

9959887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318 (or 1311 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 55.

The square root of 9959887 is about 3155.9288648510. The cubic root of 9959887 is about 215.1550135024.

The spelling of 9959887 in words is "nine million, nine hundred fifty-nine thousand, eight hundred eighty-seven".