1089858169 has 3 divisors (see below), whose sum is σ = 1089891183. Its totient is φ = 1089825156.

The previous prime is 1089858163. The next prime is 1089858179. The reversal of 1089858169 is 9618589801.

The square root of 1089858169 is 33013.

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.

It can be written as a sum of positive squares in only one way, i.e., 190578025 + 899280144 = 13805^2 + 29988^2 .

It is not a de Polignac number, because 1089858169 - 2¹³ = 1089849977 is a prime.

It is a super-2 number, since 2×1089858169² = 2375581657072065122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1089858163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 16507 + ... + 49519.

It is an arithmetic number, because the mean of its divisors is an integer number (363297061).

Almost surely, 2^1089858169 is an apocalyptic number.

1089858169 is the 33013-rd square number.

1089858169 is the 16507-th centered octagonal number.

It is an amenable number.

1089858169 is a deficient number, since it is larger than the sum of its proper divisors (33014).

1089858169 is an frugal number, since it uses more digits than its factorization.

1089858169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66026 (or 33013 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 55.

The cubic root of 1089858169 is about 1029.0978272331.

The spelling of 1089858169 in words is "one billion, eighty-nine million, eight hundred fifty-eight thousand, one hundred sixty-nine".