166933289 has 2 divisors, whose sum is σ = 166933290. Its totient is φ = 166933288.

The previous prime is 166933211. The next prime is 166933343. The reversal of 166933289 is 982339661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166926400 + 6889 = 12920^2 + 83^2 .

It is a cyclic number.

It is not a de Polignac number, because 166933289 - 2²⁴ = 150156073 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (166963289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83466644 + 83466645.

It is an arithmetic number, because the mean of its divisors is an integer number (83466645).

Almost surely, 2^166933289 is an apocalyptic number.

It is an amenable number.

166933289 is a deficient number, since it is larger than the sum of its proper divisors (1).

166933289 is an equidigital number, since it uses as much as digits as its factorization.

166933289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 47.

The square root of 166933289 is about 12920.2665994166. The cubic root of 166933289 is about 550.6145076535.

The spelling of 166933289 in words is "one hundred sixty-six million, nine hundred thirty-three thousand, two hundred eighty-nine".