9889 has 8 divisors (see below), whose sum is σ = 11520. Its totient is φ = 8400.
The previous prime is 9887. The next prime is 9901.
9889 is nontrivially palindromic in base 10.
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 9889 - 21 = 9887 is a prime.
It is a Duffinian number.
It is a plaindrome in base 13.
It is not an unprimeable number, because it can be changed into a prime (9883) 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, 304 + ... + 334.
It is an arithmetic number, because the mean of its divisors is an integer number (1440).
29889 is an apocalyptic number.
It is an amenable number.
9889 is a deficient number, since it is larger than the sum of its proper divisors (1631).
9889 is a wasteful number, since it uses less digits than its factorization.
9889 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 71.
The product of its digits is 5184, while the sum is 34.
The square root of 9889 is about 99.4434512675. The cubic root of 9889 is about 21.4643360423.
It can be divided in two parts, 9 and 889, that multiplied together give a triangular number (8001 = T126).
The spelling of 9889 in words is "nine thousand, eight hundred eighty-nine".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.062 sec. • engine limits •