143789 has 4 divisors (see below), whose sum is σ = 146556. Its totient is φ = 141024.

The previous prime is 143779. The next prime is 143791. The reversal of 143789 is 987341.

143789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 987341 = 353 ⋅2797.

It can be written as a sum of positive squares in 2 ways, for example, as 128164 + 15625 = 358^2 + 125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1304 + ... + 1409.

It is an arithmetic number, because the mean of its divisors is an integer number (36639).

2¹⁴³⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

143789 is a deficient number, since it is larger than the sum of its proper divisors (2767).

143789 is an equidigital number, since it uses as much as digits as its factorization.

143789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2766.

The product of its digits is 6048, while the sum is 32.

The square root of 143789 is about 379.1952003916. The cubic root of 143789 is about 52.3892146091.

The spelling of 143789 in words is "one hundred forty-three thousand, seven hundred eighty-nine".