143744569921 has 2 divisors, whose sum is σ = 143744569922. Its totient is φ = 143744569920.

The previous prime is 143744569909. The next prime is 143744570063. The reversal of 143744569921 is 129965447341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119107814400 + 24636755521 = 345120^2 + 156961^2 .

It is an emirp because it is prime and its reverse (129965447341) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143744569921 is a prime.

It is not a weakly prime, because it can be changed into another prime (143744569021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71872284960 + 71872284961.

It is an arithmetic number, because the mean of its divisors is an integer number (71872284961).

Almost surely, 2^143744569921 is an apocalyptic number.

It is an amenable number.

143744569921 is a deficient number, since it is larger than the sum of its proper divisors (1).

143744569921 is an equidigital number, since it uses as much as digits as its factorization.

143744569921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 55.

The spelling of 143744569921 in words is "one hundred forty-three billion, seven hundred forty-four million, five hundred sixty-nine thousand, nine hundred twenty-one".