143909 has 2 divisors, whose sum is σ = 143910. Its totient is φ = 143908.

The previous prime is 143881. The next prime is 143947. The reversal of 143909 is 909341.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112225 + 31684 = 335^2 + 178^2 .

It is an emirp because it is prime and its reverse (909341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 143909 - 2⁸ = 143653 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 143909.

It is not a weakly prime, because it can be changed into another prime (143999) 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 as a sum of consecutive naturals, namely, 71954 + 71955.

It is an arithmetic number, because the mean of its divisors is an integer number (71955).

2¹⁴³⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

143909 is a deficient number, since it is larger than the sum of its proper divisors (1).

143909 is an equidigital number, since it uses as much as digits as its factorization.

143909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 143909 is about 379.3533972433. The cubic root of 143909 is about 52.4037844711.

The spelling of 143909 in words is "one hundred forty-three thousand, nine hundred nine".