9989955 has 12 divisors (see below), whose sum is σ = 17316000. Its totient is φ = 5327952.

The previous prime is 9989927. The next prime is 9989957. The reversal of 9989955 is 5599899.

9989955 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9989955 - 2⁵ = 9989923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9989957) 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, 110955 + ... + 111044.

It is an arithmetic number, because the mean of its divisors is an integer number (1443000).

Almost surely, 2^9989955 is an apocalyptic number.

9989955 is a deficient number, since it is larger than the sum of its proper divisors (7326045).

9989955 is a wasteful number, since it uses less digits than its factorization.

9989955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222010 (or 222007 counting only the distinct ones).

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

The square root of 9989955 is about 3160.6890071628. The cubic root of 9989955 is about 215.3713071807.

The spelling of 9989955 in words is "nine million, nine hundred eighty-nine thousand, nine hundred fifty-five".