143695889 has 2 divisors, whose sum is σ = 143695890. Its totient is φ = 143695888.

The previous prime is 143695859. The next prime is 143695891. The reversal of 143695889 is 988596341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75550864 + 68145025 = 8692^2 + 8255^2 .

It is a cyclic number.

It is not a de Polignac number, because 143695889 - 2¹⁶ = 143630353 is a prime.

Together with 143695891, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 143695889.

It is not a weakly prime, because it can be changed into another prime (143695859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71847944 + 71847945.

It is an arithmetic number, because the mean of its divisors is an integer number (71847945).

Almost surely, 2^143695889 is an apocalyptic number.

It is an amenable number.

143695889 is a deficient number, since it is larger than the sum of its proper divisors (1).

143695889 is an equidigital number, since it uses as much as digits as its factorization.

143695889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 53.

The square root of 143695889 is about 11987.3220111917. The cubic root of 143695889 is about 523.7790390273.

The spelling of 143695889 in words is "one hundred forty-three million, six hundred ninety-five thousand, eight hundred eighty-nine".