16168289 has 2 divisors, whose sum is σ = 16168290. Its totient is φ = 16168288.

The previous prime is 16168277. The next prime is 16168291. The reversal of 16168289 is 98286161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13017664 + 3150625 = 3608^2 + 1775^2 .

It is an emirp because it is prime and its reverse (98286161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16168289 - 2¹⁶ = 16102753 is a prime.

It is a super-2 number, since 2×16168289² = 522827138375042, which contains 22 as substring.

Together with 16168291, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16168489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8084144 + 8084145.

It is an arithmetic number, because the mean of its divisors is an integer number (8084145).

Almost surely, 2^16168289 is an apocalyptic number.

It is an amenable number.

16168289 is a deficient number, since it is larger than the sum of its proper divisors (1).

16168289 is an equidigital number, since it uses as much as digits as its factorization.

16168289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 41.

The square root of 16168289 is about 4020.9810991846. The cubic root of 16168289 is about 252.8645924066.

The spelling of 16168289 in words is "sixteen million, one hundred sixty-eight thousand, two hundred eighty-nine".