143333989 has 2 divisors, whose sum is σ = 143333990. Its totient is φ = 143333988.

The previous prime is 143333969. The next prime is 143334001. The reversal of 143333989 is 989333341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91968100 + 51365889 = 9590^2 + 7167^2 .

It is an emirp because it is prime and its reverse (989333341) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143333989 is a prime.

It is equal to p_8089891 and since 143333989 and 8089891 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143333969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71666994 + 71666995.

It is an arithmetic number, because the mean of its divisors is an integer number (71666995).

Almost surely, 2^143333989 is an apocalyptic number.

It is an amenable number.

143333989 is a deficient number, since it is larger than the sum of its proper divisors (1).

143333989 is an equidigital number, since it uses as much as digits as its factorization.

143333989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 43.

The square root of 143333989 is about 11972.2173802517. The cubic root of 143333989 is about 523.3389545513.

The spelling of 143333989 in words is "one hundred forty-three million, three hundred thirty-three thousand, nine hundred eighty-nine".