1489 has 2 divisors, whose sum is σ = 1490.
Its totient is φ = 1488.
The previous prime is 1487. The next prime is 1493. The reversal of 1489 is 9841.
1489 = T30 + T31 +
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 1089 + 400 = 33^2 + 20^2
It is a cyclic number.
It is not a de Polignac number, because 1489 - 21 = 1487 is a prime.
Together with 1487, it forms a pair of twin primes.
It is an Ulam number.
It is a plaindrome in base 10 and base 11.
It is a nialpdrome in base 12.
It is not a weakly prime, because it can be changed into another prime (1481) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 744 + 745.
It is an arithmetic number, because the mean of its divisors is an integer number (745).
1489 is the 32-nd centered triangular number.
It is an amenable number.
1489 is a deficient number, since it is larger than the sum of its proper divisors (1).
1489 is an equidigital number, since it uses as much as digits as its factorization.
1489 is an evil number, because the sum of its binary digits is even.
The product of its digits is 288, while the sum is 22.
The square root of 1489 is about 38.5875627631.
The cubic root of 1489 is about 11.4190918416.
The spelling of 1489 in words is "one thousand, four hundred eighty-nine".