169859089 has 3 divisors (see below), whose sum is σ = 169872123. Its totient is φ = 169846056.

The previous prime is 169859077. The next prime is 169859093. The reversal of 169859089 is 980958961.

The square root of 169859089 is 13033.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 980958961 = 19 ⋅51629419.

It can be written as a sum of positive squares in only one way, i.e., 105987025 + 63872064 = 10295^2 + 7992^2 .

It is not a de Polignac number, because 169859089 - 2⁵ = 169859057 is a prime.

It is a super-2 number, since 2×169859089² = 57704220231819842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169859059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6517 + ... + 19549.

It is an arithmetic number, because the mean of its divisors is an integer number (56624041).

Almost surely, 2^169859089 is an apocalyptic number.

169859089 is the 13033-rd square number.

169859089 is the 6517-th centered octagonal number.

It is an amenable number.

169859089 is a deficient number, since it is larger than the sum of its proper divisors (13034).

169859089 is an frugal number, since it uses more digits than its factorization.

169859089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26066 (or 13033 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 55.

The cubic root of 169859089 is about 553.8127247813.

The spelling of 169859089 in words is "one hundred sixty-nine million, eight hundred fifty-nine thousand, eighty-nine".