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16489 = 111499
BaseRepresentation
bin100000001101001
3211121201
410001221
51011424
6204201
766034
oct40151
924551
1016489
1111430
129661
137675
14601b
154d44
hex4069

16489 has 4 divisors (see below), whose sum is σ = 18000. Its totient is φ = 14980.

The previous prime is 16487. The next prime is 16493. The reversal of 16489 is 98461.

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 an emirpimes, since its reverse is a distinct semiprime: 98461 = 118951.

It is a cyclic number.

It is not a de Polignac number, because 16489 - 21 = 16487 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (16481) 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, 739 + ... + 760.

It is an arithmetic number, because the mean of its divisors is an integer number (4500).

216489 is an apocalyptic number.

It is an amenable number.

16489 is a deficient number, since it is larger than the sum of its proper divisors (1511).

16489 is a wasteful number, since it uses less digits than its factorization.

16489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510.

The product of its digits is 1728, while the sum is 28.

The square root of 16489 is about 128.4095012061. The cubic root of 16489 is about 25.4525582091.

Subtracting from 16489 its sum of digits (28), we obtain a palindrome (16461).

It can be divided in two parts, 164 and 89, that added together give a triangular number (253 = T22).

The spelling of 16489 in words is "sixteen thousand, four hundred eighty-nine".

Divisors: 1 11 1499 16489