143731139 has 4 divisors (see below), whose sum is σ = 146167320. Its totient is φ = 141294960.

The previous prime is 143731111. The next prime is 143731151. The reversal of 143731139 is 931137341.

It is a happy number.

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 143731139 - 2¹⁶ = 143665603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143731169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1218002 + ... + 1218119.

It is an arithmetic number, because the mean of its divisors is an integer number (36541830).

Almost surely, 2^143731139 is an apocalyptic number.

143731139 is a deficient number, since it is larger than the sum of its proper divisors (2436181).

143731139 is an equidigital number, since it uses as much as digits as its factorization.

143731139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2436180.

The product of its digits is 6804, while the sum is 32.

The square root of 143731139 is about 11988.7922244069. The cubic root of 143731139 is about 523.8218648908.

The spelling of 143731139 in words is "one hundred forty-three million, seven hundred thirty-one thousand, one hundred thirty-nine".