169442289 has 9 divisors (see below), whose sum is σ = 244806393. Its totient is φ = 112935492.

The previous prime is 169442269. The next prime is 169442297. The reversal of 169442289 is 982244961.

The square root of 169442289 is 13017.

It is a perfect power (a square), and thus also a powerful number.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 169442289 - 2⁹ = 169441777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (169442269) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 36882 + ... + 41220.

Almost surely, 2^169442289 is an apocalyptic number.

169442289 is the 13017-th square number.

169442289 is the 6509-th centered octagonal number.

It is an amenable number.

169442289 is a deficient number, since it is larger than the sum of its proper divisors (75364104).

169442289 is an frugal number, since it uses more digits than its factorization.

169442289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8684 (or 4342 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The cubic root of 169442289 is about 553.3593721315.

The spelling of 169442289 in words is "one hundred sixty-nine million, four hundred forty-two thousand, two hundred eighty-nine".