16768289 has 4 divisors (see below), whose sum is σ = 17221524. Its totient is φ = 16315056.

The previous prime is 16768277. The next prime is 16768309. The reversal of 16768289 is 98286761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98286761 = 139 ⋅707099.

It can be written as a sum of positive squares in 2 ways, for example, as 10291264 + 6477025 = 3208^2 + 2545^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16768289 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16768249) 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, 226562 + ... + 226635.

It is an arithmetic number, because the mean of its divisors is an integer number (4305381).

Almost surely, 2^16768289 is an apocalyptic number.

It is an amenable number.

16768289 is a deficient number, since it is larger than the sum of its proper divisors (453235).

16768289 is an equidigital number, since it uses as much as digits as its factorization.

16768289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453234.

The product of its digits is 290304, while the sum is 47.

The square root of 16768289 is about 4094.9101333241. The cubic root of 16768289 is about 255.9545868744.

The spelling of 16768289 in words is "sixteen million, seven hundred sixty-eight thousand, two hundred eighty-nine".