143840065 has 4 divisors (see below), whose sum is σ = 172608084. Its totient is φ = 115072048.

The previous prime is 143840063. The next prime is 143840083. The reversal of 143840065 is 560048341.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 83978896 + 59861169 = 9164^2 + 7737^2 .

It is a cyclic number.

It is not a de Polignac number, because 143840065 - 2¹ = 143840063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143840063) 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, 14384002 + ... + 14384011.

It is an arithmetic number, because the mean of its divisors is an integer number (43152021).

Almost surely, 2^143840065 is an apocalyptic number.

It is an amenable number.

143840065 is a deficient number, since it is larger than the sum of its proper divisors (28768019).

143840065 is an equidigital number, since it uses as much as digits as its factorization.

143840065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28768018.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 143840065 is about 11993.3341902909. The cubic root of 143840065 is about 523.9541568289.

The spelling of 143840065 in words is "one hundred forty-three million, eight hundred forty thousand, sixty-five".