168330689 has 2 divisors, whose sum is σ = 168330690. Its totient is φ = 168330688.

The previous prime is 168330683. The next prime is 168330691. The reversal of 168330689 is 986033861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104857600 + 63473089 = 10240^2 + 7967^2 .

It is a cyclic number.

It is not a de Polignac number, because 168330689 - 2¹² = 168326593 is a prime.

Together with 168330691, 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 (168330683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84165344 + 84165345.

It is an arithmetic number, because the mean of its divisors is an integer number (84165345).

Almost surely, 2^168330689 is an apocalyptic number.

It is an amenable number.

168330689 is a deficient number, since it is larger than the sum of its proper divisors (1).

168330689 is an equidigital number, since it uses as much as digits as its factorization.

168330689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 168330689 is about 12974.2317306267. The cubic root of 168330689 is about 552.1466400041.

The spelling of 168330689 in words is "one hundred sixty-eight million, three hundred thirty thousand, six hundred eighty-nine".