16489289 has 4 divisors (see below), whose sum is σ = 16563456. Its totient is φ = 16415124.

The previous prime is 16489273. The next prime is 16489357. The reversal of 16489289 is 98298461.

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.

It is a cyclic number.

It is not a de Polignac number, because 16489289 - 2⁴ = 16489273 is a prime.

It is a super-3 number, since 3×16489289³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (16489219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36749 + ... + 37194.

It is an arithmetic number, because the mean of its divisors is an integer number (4140864).

Almost surely, 2^16489289 is an apocalyptic number.

It is an amenable number.

16489289 is a deficient number, since it is larger than the sum of its proper divisors (74167).

16489289 is an equidigital number, since it uses as much as digits as its factorization.

16489289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74166.

The product of its digits is 248832, while the sum is 47.

The square root of 16489289 is about 4060.7005553229. The cubic root of 16489289 is about 254.5270690918.

The spelling of 16489289 in words is "sixteen million, four hundred eighty-nine thousand, two hundred eighty-nine".