143243239 has 2 divisors, whose sum is σ = 143243240. Its totient is φ = 143243238.

The previous prime is 143243203. The next prime is 143243257. The reversal of 143243239 is 932342341.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 143243239 - 2⁹ = 143242727 is a prime.

It is a super-2 number, since 2×143243239² = 41037251038422242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 143243239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143243939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71621619 + 71621620.

It is an arithmetic number, because the mean of its divisors is an integer number (71621620).

Almost surely, 2^143243239 is an apocalyptic number.

143243239 is a deficient number, since it is larger than the sum of its proper divisors (1).

143243239 is an equidigital number, since it uses as much as digits as its factorization.

143243239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 31.

The square root of 143243239 is about 11968.4267554261. The cubic root of 143243239 is about 523.2284828779.

The spelling of 143243239 in words is "one hundred forty-three million, two hundred forty-three thousand, two hundred thirty-nine".