143331389 has 2 divisors, whose sum is σ = 143331390. Its totient is φ = 143331388.

The previous prime is 143331361. The next prime is 143331431. The reversal of 143331389 is 983133341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134676025 + 8655364 = 11605^2 + 2942^2 .

It is a cyclic number.

It is not a de Polignac number, because 143331389 - 2²⁰ = 142282813 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143331319) 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 as a sum of consecutive naturals, namely, 71665694 + 71665695.

It is an arithmetic number, because the mean of its divisors is an integer number (71665695).

Almost surely, 2^143331389 is an apocalyptic number.

It is an amenable number.

143331389 is a deficient number, since it is larger than the sum of its proper divisors (1).

143331389 is an equidigital number, since it uses as much as digits as its factorization.

143331389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 35.

The square root of 143331389 is about 11972.1087950286. The cubic root of 143331389 is about 523.3357901715.

The spelling of 143331389 in words is "one hundred forty-three million, three hundred thirty-one thousand, three hundred eighty-nine".