166963289 has 2 divisors, whose sum is σ = 166963290. Its totient is φ = 166963288.

The previous prime is 166963271. The next prime is 166963297. The reversal of 166963289 is 982369661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164737225 + 2226064 = 12835^2 + 1492^2 .

It is a cyclic number.

It is not a de Polignac number, because 166963289 - 2⁸ = 166963033 is a prime.

It is not a weakly prime, because it can be changed into another prime (166963229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83481644 + 83481645.

It is an arithmetic number, because the mean of its divisors is an integer number (83481645).

Almost surely, 2^166963289 is an apocalyptic number.

It is an amenable number.

166963289 is a deficient number, since it is larger than the sum of its proper divisors (1).

166963289 is an equidigital number, since it uses as much as digits as its factorization.

166963289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 50.

The square root of 166963289 is about 12921.4275140172. The cubic root of 166963289 is about 550.6474897824.

The spelling of 166963289 in words is "one hundred sixty-six million, nine hundred sixty-three thousand, two hundred eighty-nine".