143939 has 4 divisors (see below), whose sum is σ = 152424. Its totient is φ = 135456.

The previous prime is 143909. The next prime is 143947. The reversal of 143939 is 939341.

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

It is a de Polignac number, because none of the positive numbers 2^k-143939 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 143939.

It is not an unprimeable number, because it can be changed into a prime (143909) 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, 4217 + ... + 4250.

It is an arithmetic number, because the mean of its divisors is an integer number (38106).

2¹⁴³⁹³⁹ is an apocalyptic number.

143939 is a deficient number, since it is larger than the sum of its proper divisors (8485).

143939 is an equidigital number, since it uses as much as digits as its factorization.

143939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8484.

The product of its digits is 2916, while the sum is 29.

The square root of 143939 is about 379.3929361493. The cubic root of 143939 is about 52.4074256710.

The spelling of 143939 in words is "one hundred forty-three thousand, nine hundred thirty-nine".