143983639 has 4 divisors (see below), whose sum is σ = 144198256. Its totient is φ = 143769024.

The previous prime is 143983633. The next prime is 143983643. The reversal of 143983639 is 936389341.

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 143983639 - 2¹⁷ = 143852567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143983633) 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, 106299 + ... + 107644.

It is an arithmetic number, because the mean of its divisors is an integer number (36049564).

Almost surely, 2^143983639 is an apocalyptic number.

143983639 is a deficient number, since it is larger than the sum of its proper divisors (214617).

143983639 is an equidigital number, since it uses as much as digits as its factorization.

143983639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214616.

The product of its digits is 419904, while the sum is 46.

The square root of 143983639 is about 11999.3182723020. The cubic root of 143983639 is about 524.1284271872.

It can be divided in two parts, 1439 and 83639, that added together give a triangular number (85078 = T₄₁₂).

The spelling of 143983639 in words is "one hundred forty-three million, nine hundred eighty-three thousand, six hundred thirty-nine".