24989 has 2 divisors, whose sum is σ = 24990.
Its totient is φ = 24988.
The previous prime is 24979. The next prime is 25013. The reversal of 24989 is 98942.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 24964 + 25 = 158^2 + 5^2
It is a cyclic number.
It is not a de Polignac number, because 24989 - 28 = 24733 is a prime.
It is a Chen prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (24919) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12494 + 12495.
It is an arithmetic number, because the mean of its divisors is an integer number (12495).
224989 is an apocalyptic number.
It is an amenable number.
24989 is a deficient number, since it is larger than the sum of its proper divisors (1).
24989 is an equidigital number, since it uses as much as digits as its factorization.
24989 is an evil number, because the sum of its binary digits is even.
The product of its digits is 5184, while the sum is 32.
The square root of 24989 is about 158.0790941270.
The cubic root of 24989 is about 29.2358881936.
The spelling of 24989 in words is "twenty-four thousand, nine hundred eighty-nine".