143709 has 4 divisors (see below), whose sum is σ = 191616. Its totient is φ = 95804.

The previous prime is 143699. The next prime is 143711. The reversal of 143709 is 907341.

143709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 143709 - 2⁵ = 143677 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143719) 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, 23949 + ... + 23954.

It is an arithmetic number, because the mean of its divisors is an integer number (47904).

2¹⁴³⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

143709 is a deficient number, since it is larger than the sum of its proper divisors (47907).

143709 is an equidigital number, since it uses as much as digits as its factorization.

143709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47906.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 143709 is about 379.0896991478. The cubic root of 143709 is about 52.3794968637.

The spelling of 143709 in words is "one hundred forty-three thousand, seven hundred nine".