143378869 has 2 divisors, whose sum is σ = 143378870. Its totient is φ = 143378868.

The previous prime is 143378839. The next prime is 143378887. The reversal of 143378869 is 968873341.

It is a happy number.

143378869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143280900 + 97969 = 11970^2 + 313^2 .

It is a cyclic number.

It is not a de Polignac number, because 143378869 - 2¹⁹ = 142854581 is a prime.

It is a super-3 number, since 3×143378869³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143378839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71689434 + 71689435.

It is an arithmetic number, because the mean of its divisors is an integer number (71689435).

Almost surely, 2^143378869 is an apocalyptic number.

It is an amenable number.

143378869 is a deficient number, since it is larger than the sum of its proper divisors (1).

143378869 is an equidigital number, since it uses as much as digits as its factorization.

143378869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 49.

The square root of 143378869 is about 11974.0915730589. The cubic root of 143378869 is about 523.3935705835.

The spelling of 143378869 in words is "one hundred forty-three million, three hundred seventy-eight thousand, eight hundred sixty-nine".