9955989 has 12 divisors (see below), whose sum is σ = 14732172. Its totient is φ = 6475200.

The previous prime is 9955949. The next prime is 9956003. The reversal of 9955989 is 9895599.

9955989 is a `hidden beast` number, since 9 + 9 + 559 + 89 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 756900 + 9199089 = 870^2 + 3033^2 .

It is not a de Polignac number, because 9955989 - 2¹⁷ = 9824917 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9955909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13122 + ... + 13859.

It is an arithmetic number, because the mean of its divisors is an integer number (1227681).

Almost surely, 2^9955989 is an apocalyptic number.

It is an amenable number.

9955989 is a deficient number, since it is larger than the sum of its proper divisors (4776183).

9955989 is a wasteful number, since it uses less digits than its factorization.

9955989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27028 (or 27025 counting only the distinct ones).

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

The square root of 9955989 is about 3155.3112366294. The cubic root of 9955989 is about 215.1269414411.

The spelling of 9955989 in words is "nine million, nine hundred fifty-five thousand, nine hundred eighty-nine".