100489 has 3 divisors (see below), whose sum is σ = 100807.
Its totient is φ = 100172.
The previous prime is 100483. The next prime is 100493. The reversal of 100489 is 984001.
100489 = T316 + T317.
The square root of 100489 is 317.
It is a perfect power (a square), and thus also a powerful number.
100489 is nontrivially palindromic in base 4.
100489 is an esthetic number in base 7, because in such base its adjacent digits differ by 1.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 984001 = 271 ⋅3631.
It can be written as a sum of positive squares in only one way, i.e., 5625 + 94864 = 75^2 + 308^2
It is not a de Polignac number, because 100489 - 27 = 100361 is a prime.
It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors.
It is a Duffinian number.
It is a plaindrome in base 14 and base 16.
It is not an unprimeable number, because it can be changed into a prime (100483) by changing a digit.
It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 159 + ... + 475.
2100489 is an apocalyptic number.
100489 is the 317-th square number.
100489 is the 159-th centered octagonal number.
It is an amenable number.
100489 is a deficient number, since it is larger than the sum of its proper divisors (318).
100489 is an frugal number, since it uses more digits than its factorization.
100489 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 634 (or 317 counting only the distinct ones).
The product of its (nonzero) digits is 288, while the sum is 22.
The cubic root of 100489 is about 46.4914232457.
The spelling of 100489 in words is "one hundred thousand, four hundred eighty-nine".