169009289 has 2 divisors, whose sum is σ = 169009290. Its totient is φ = 169009288.

The previous prime is 169009279. The next prime is 169009297. The reversal of 169009289 is 982900961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166203664 + 2805625 = 12892^2 + 1675^2 .

It is a cyclic number.

It is not a de Polignac number, because 169009289 - 2²⁰ = 167960713 is a prime.

It is not a weakly prime, because it can be changed into another prime (169009279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84504644 + 84504645.

It is an arithmetic number, because the mean of its divisors is an integer number (84504645).

Almost surely, 2^169009289 is an apocalyptic number.

It is an amenable number.

169009289 is a deficient number, since it is larger than the sum of its proper divisors (1).

169009289 is an equidigital number, since it uses as much as digits as its factorization.

169009289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 169009289 is about 13000.3572643216. The cubic root of 169009289 is about 552.8876107265.

The spelling of 169009289 in words is "one hundred sixty-nine million, nine thousand, two hundred eighty-nine".