143889 has 4 divisors (see below), whose sum is σ = 191856. Its totient is φ = 95924.

The previous prime is 143881. The next prime is 143909. The reversal of 143889 is 988341.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 143889 - 2³ = 143881 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (143881) 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, 23979 + ... + 23984.

It is an arithmetic number, because the mean of its divisors is an integer number (47964).

2¹⁴³⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

143889 is a deficient number, since it is larger than the sum of its proper divisors (47967).

143889 is an equidigital number, since it uses as much as digits as its factorization.

143889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47966.

The product of its digits is 6912, while the sum is 33.

The square root of 143889 is about 379.3270356829. The cubic root of 143889 is about 52.4013567234.

The spelling of 143889 in words is "one hundred forty-three thousand, eight hundred eighty-nine".