169489669 has 2 divisors, whose sum is σ = 169489670. Its totient is φ = 169489668.

The previous prime is 169489651. The next prime is 169489729. The reversal of 169489669 is 966984961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168013444 + 1476225 = 12962^2 + 1215^2 .

It is a cyclic number.

It is not a de Polignac number, because 169489669 - 2¹⁷ = 169358597 is a prime.

It is a super-2 number, since 2×169489669² = 57453495795459122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169489169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84744834 + 84744835.

It is an arithmetic number, because the mean of its divisors is an integer number (84744835).

Almost surely, 2^169489669 is an apocalyptic number.

It is an amenable number.

169489669 is a deficient number, since it is larger than the sum of its proper divisors (1).

169489669 is an equidigital number, since it uses as much as digits as its factorization.

169489669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5038848, while the sum is 58.

The square root of 169489669 is about 13018.8198005810. The cubic root of 169489669 is about 553.4109447030.

The spelling of 169489669 in words is "one hundred sixty-nine million, four hundred eighty-nine thousand, six hundred sixty-nine".