168133729 has 2 divisors, whose sum is σ = 168133730. Its totient is φ = 168133728.

The previous prime is 168133709. The next prime is 168133733. The reversal of 168133729 is 927331861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167650704 + 483025 = 12948^2 + 695^2 .

It is a cyclic number.

It is not a de Polignac number, because 168133729 - 2⁷ = 168133601 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 168133691 and 168133700.

It is not a weakly prime, because it can be changed into another prime (168133709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84066864 + 84066865.

It is an arithmetic number, because the mean of its divisors is an integer number (84066865).

Almost surely, 2^168133729 is an apocalyptic number.

It is an amenable number.

168133729 is a deficient number, since it is larger than the sum of its proper divisors (1).

168133729 is an equidigital number, since it uses as much as digits as its factorization.

168133729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 168133729 is about 12966.6390788053. The cubic root of 168133729 is about 551.9312044506.

The spelling of 168133729 in words is "one hundred sixty-eight million, one hundred thirty-three thousand, seven hundred twenty-nine".