143811389 has 2 divisors, whose sum is σ = 143811390. Its totient is φ = 143811388.

The previous prime is 143811359. The next prime is 143811391. The reversal of 143811389 is 983118341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141967225 + 1844164 = 11915^2 + 1358^2 .

It is a cyclic number.

It is not a de Polignac number, because 143811389 - 2²⁰ = 142762813 is a prime.

It is a super-2 number, since 2×143811389² = 41363431212218642, which contains 22 as substring.

Together with 143811391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143811329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71905694 + 71905695.

It is an arithmetic number, because the mean of its divisors is an integer number (71905695).

Almost surely, 2^143811389 is an apocalyptic number.

It is an amenable number.

143811389 is a deficient number, since it is larger than the sum of its proper divisors (1).

143811389 is an equidigital number, since it uses as much as digits as its factorization.

143811389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 38.

The square root of 143811389 is about 11992.1386332881. The cubic root of 143811389 is about 523.9193359604.

The spelling of 143811389 in words is "one hundred forty-three million, eight hundred eleven thousand, three hundred eighty-nine".