143987 has 4 divisors (see below), whose sum is σ = 145176. Its totient is φ = 142800.

The previous prime is 143981. The next prime is 143999. The reversal of 143987 is 789341.

143987 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.

It is a cyclic number.

It is not a de Polignac number, because 143987 - 2⁴ = 143971 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 143987.

It is not an unprimeable number, because it can be changed into a prime (143981) 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, 389 + ... + 662.

It is an arithmetic number, because the mean of its divisors is an integer number (36294).

2¹⁴³⁹⁸⁷ is an apocalyptic number.

143987 is a deficient number, since it is larger than the sum of its proper divisors (1189).

143987 is a wasteful number, since it uses less digits than its factorization.

143987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188.

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

The square root of 143987 is about 379.4561898296. The cubic root of 143987 is about 52.4132505386.

It can be divided in two parts, 143 and 987, that multiplied together give a palindrome (141141).

The spelling of 143987 in words is "one hundred forty-three thousand, nine hundred eighty-seven".