9959859 has 24 divisors (see below), whose sum is σ = 17707872. Its totient is φ = 5253120.

The previous prime is 9959837. The next prime is 9959861. The reversal of 9959859 is 9589599.

It is not a de Polignac number, because 9959859 - 2⁵ = 9959827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9959869) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5262 + ... + 6899.

It is an arithmetic number, because the mean of its divisors is an integer number (737828).

Almost surely, 2^9959859 is an apocalyptic number.

9959859 is a deficient number, since it is larger than the sum of its proper divisors (7748013).

9959859 is a wasteful number, since it uses less digits than its factorization.

9959859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12187 (or 12184 counting only the distinct ones).

The product of its digits is 1312200, while the sum is 54.

The square root of 9959859 is about 3155.9244287530. The cubic root of 9959859 is about 215.1548118821.

The spelling of 9959859 in words is "nine million, nine hundred fifty-nine thousand, eight hundred fifty-nine".