9959989 has 8 divisors (see below), whose sum is σ = 11192832.
Its totient is φ = 8793840.
The previous prime is 9959987. The next prime is 9960023. The reversal of 9959989 is 9899599.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 9959989 - 21 = 9959987 is a prime.
It is a Duffinian number.
9959989 is a lucky number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (9959981) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16357 + ... + 16954.
It is an arithmetic number, because the mean of its divisors is an integer number (1399104).
Almost surely, 29959989 is an apocalyptic number.
It is an amenable number.
9959989 is a deficient number, since it is larger than the sum of its proper divisors (1232843).
9959989 is a wasteful number, since it uses less digits than its factorization.
9959989 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 33347.
The product of its digits is 2361960, while the sum is 58.
The square root of 9959989 is about 3155.9450248697.
The cubic root of 9959989 is about 215.1557479732.
The spelling of 9959989 in words is "nine million, nine hundred fifty-nine thousand, nine hundred eighty-nine".