1689164189 has 4 divisors (see below), whose sum is σ = 1747411260. Its totient is φ = 1630917120.

The previous prime is 1689164153. The next prime is 1689164209. The reversal of 1689164189 is 9814619861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 551451289 + 1137712900 = 23483^2 + 33730^2 .

It is a cyclic number.

It is not a de Polignac number, because 1689164189 - 2⁸ = 1689163933 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1689164189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689164119) 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 3 ways as a sum of consecutive naturals, for example, 29123492 + ... + 29123549.

It is an arithmetic number, because the mean of its divisors is an integer number (436852815).

Almost surely, 2^1689164189 is an apocalyptic number.

It is an amenable number.

1689164189 is a deficient number, since it is larger than the sum of its proper divisors (58247071).

1689164189 is an equidigital number, since it uses as much as digits as its factorization.

1689164189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58247070.

The product of its digits is 746496, while the sum is 53.

The square root of 1689164189 is about 41099.4426847859. The cubic root of 1689164189 is about 1190.9420285955.

The spelling of 1689164189 in words is "one billion, six hundred eighty-nine million, one hundred sixty-four thousand, one hundred eighty-nine".