143689 has 8 divisors (see below), whose sum is σ = 176960. Its totient is φ = 113616.

The previous prime is 143687. The next prime is 143699. The reversal of 143689 is 986341.

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 143689 - 2¹ = 143687 is a prime.

143689 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 143689.

It is not an unprimeable number, because it can be changed into a prime (143687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 699 + ... + 880.

It is an arithmetic number, because the mean of its divisors is an integer number (22120).

2¹⁴³⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

143689 is a deficient number, since it is larger than the sum of its proper divisors (33271).

143689 is a wasteful number, since it uses less digits than its factorization.

143689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1599.

The product of its digits is 5184, while the sum is 31.

The square root of 143689 is about 379.0633192489. The cubic root of 143689 is about 52.3770668638.

The spelling of 143689 in words is "one hundred forty-three thousand, six hundred eighty-nine".