1689144289 has 8 divisors (see below), whose sum is σ = 2032053440. Its totient is φ = 1371635856.

The previous prime is 1689144271. The next prime is 1689144307. The reversal of 1689144289 is 9824419861.

It is an interprime number because it is at equal distance from previous prime (1689144271) and next prime (1689144307).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1689144289 - 2⁵ = 1689144257 is a prime.

It is a super-4 number, since 4×1689144289⁴ (a number of 38 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1089144289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6350034 + ... + 6350299.

It is an arithmetic number, because the mean of its divisors is an integer number (254006680).

Almost surely, 2^1689144289 is an apocalyptic number.

1689144289 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1689144289 is a deficient number, since it is larger than the sum of its proper divisors (342909151).

1689144289 is a wasteful number, since it uses less digits than its factorization.

1689144289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12700359.

The product of its digits is 995328, while the sum is 52.

The square root of 1689144289 is about 41099.2005883326. The cubic root of 1689144289 is about 1190.9373517580.

The spelling of 1689144289 in words is "one billion, six hundred eighty-nine million, one hundred forty-four thousand, two hundred eighty-nine".