143728789 has 2 divisors, whose sum is σ = 143728790. Its totient is φ = 143728788.

The previous prime is 143728733. The next prime is 143728799. The reversal of 143728789 is 987827341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123099025 + 20629764 = 11095^2 + 4542^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143728789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143728709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71864394 + 71864395.

It is an arithmetic number, because the mean of its divisors is an integer number (71864395).

Almost surely, 2^143728789 is an apocalyptic number.

It is an amenable number.

143728789 is a deficient number, since it is larger than the sum of its proper divisors (1).

143728789 is an equidigital number, since it uses as much as digits as its factorization.

143728789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 49.

The square root of 143728789 is about 11988.6942158018. The cubic root of 143728789 is about 523.8190100511.

The spelling of 143728789 in words is "one hundred forty-three million, seven hundred twenty-eight thousand, seven hundred eighty-nine".