143234321 has 2 divisors, whose sum is σ = 143234322. Its totient is φ = 143234320.

The previous prime is 143234303. The next prime is 143234323. The reversal of 143234321 is 123432341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143041600 + 192721 = 11960^2 + 439^2 .

It is a cyclic number.

It is not a de Polignac number, because 143234321 - 2⁶ = 143234257 is a prime.

Together with 143234323, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (143234323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71617160 + 71617161.

It is an arithmetic number, because the mean of its divisors is an integer number (71617161).

Almost surely, 2^143234321 is an apocalyptic number.

It is an amenable number.

143234321 is a deficient number, since it is larger than the sum of its proper divisors (1).

143234321 is an equidigital number, since it uses as much as digits as its factorization.

143234321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 23.

The square root of 143234321 is about 11968.0541860404. The cubic root of 143234321 is about 523.2176243120.

Adding to 143234321 its reverse (123432341), we get a palindrome (266666662).

It can be divided in two parts, 1432 and 34321, that added together give a palindrome (35753).

The spelling of 143234321 in words is "one hundred forty-three million, two hundred thirty-four thousand, three hundred twenty-one".