143893 has 4 divisors (see below), whose sum is σ = 147820. Its totient is φ = 139968.

The previous prime is 143881. The next prime is 143909. The reversal of 143893 is 398341.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 117649 + 26244 = 343^2 + 162^2 .

It is a 4-Lehmer number, since φ(143893) divides (143893-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 143893 - 2¹³ = 135701 is a prime.

It is a Duffinian number.

143893 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143813) 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 3 ways as a sum of consecutive naturals, for example, 1908 + ... + 1981.

It is an arithmetic number, because the mean of its divisors is an integer number (36955).

2¹⁴³⁸⁹³ is an apocalyptic number.

It is an amenable number.

143893 is a deficient number, since it is larger than the sum of its proper divisors (3927).

143893 is an equidigital number, since it uses as much as digits as its factorization.

143893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3926.

The product of its digits is 2592, while the sum is 28.

The square root of 143893 is about 379.3323081416. The cubic root of 143893 is about 52.4018422910.

The spelling of 143893 in words is "one hundred forty-three thousand, eight hundred ninety-three".