9989755 has 8 divisors (see below), whose sum is σ = 12005424. Its totient is φ = 7980000.

The previous prime is 9989747. The next prime is 9989779. The reversal of 9989755 is 5579899.

9989755 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9989755 - 2³ = 9989747 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4305 + ... + 6205.

It is an arithmetic number, because the mean of its divisors is an integer number (1500678).

Almost surely, 2^9989755 is an apocalyptic number.

9989755 is a deficient number, since it is larger than the sum of its proper divisors (2015669).

9989755 is a wasteful number, since it uses less digits than its factorization.

9989755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2957.

The product of its digits is 1020600, while the sum is 52.

The square root of 9989755 is about 3160.6573683334. The cubic root of 9989755 is about 215.3698699187.

The spelling of 9989755 in words is "nine million, nine hundred eighty-nine thousand, seven hundred fifty-five".