168133709 has 2 divisors, whose sum is σ = 168133710. Its totient is φ = 168133708.

The previous prime is 168133663. The next prime is 168133729. The reversal of 168133709 is 907331861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166978084 + 1155625 = 12922^2 + 1075^2 .

It is a cyclic number.

It is not a de Polignac number, because 168133709 - 2⁸ = 168133453 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168133729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84066854 + 84066855.

It is an arithmetic number, because the mean of its divisors is an integer number (84066855).

Almost surely, 2^168133709 is an apocalyptic number.

It is an amenable number.

168133709 is a deficient number, since it is larger than the sum of its proper divisors (1).

168133709 is an equidigital number, since it uses as much as digits as its factorization.

168133709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 168133709 is about 12966.6383075954. The cubic root of 168133709 is about 551.9311825660.

The spelling of 168133709 in words is "one hundred sixty-eight million, one hundred thirty-three thousand, seven hundred nine".