41989 has 4 divisors (see below), whose sum is σ = 42400.
Its totient is φ = 41580.
The previous prime is 41983. The next prime is 41999. The reversal of 41989 is 98914.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.
It is a cyclic number.
It is not a de Polignac number, because 41989 - 23 = 41981 is a prime.
It is a super-2 number, since 2×419892 = 3526152242, which contains 22 as substring.
It is a Duffinian number.
41989 is a lucky number.
It is a nialpdrome in base 6.
It is a self number, because there is not a number n which added to its sum of digits gives 41989.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (41981) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94 + ... + 304.
It is an arithmetic number, because the mean of its divisors is an integer number (10600).
241989 is an apocalyptic number.
It is an amenable number.
41989 is a deficient number, since it is larger than the sum of its proper divisors (411).
41989 is a wasteful number, since it uses less digits than its factorization.
41989 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 410.
The product of its digits is 2592, while the sum is 31.
The square root of 41989 is about 204.9121763098.
The cubic root of 41989 is about 34.7572315575.
The spelling of 41989 in words is "forty-one thousand, nine hundred eighty-nine".