143968549 has 2 divisors, whose sum is σ = 143968550. Its totient is φ = 143968548.

The previous prime is 143968547. The next prime is 143968553. The reversal of 143968549 is 945869341.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102880449 + 41088100 = 10143^2 + 6410^2 .

It is a cyclic number.

It is not a de Polignac number, because 143968549 - 2¹ = 143968547 is a prime.

Together with 143968547, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143968541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71984274 + 71984275.

It is an arithmetic number, because the mean of its divisors is an integer number (71984275).

Almost surely, 2^143968549 is an apocalyptic number.

It is an amenable number.

143968549 is a deficient number, since it is larger than the sum of its proper divisors (1).

143968549 is an equidigital number, since it uses as much as digits as its factorization.

143968549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 49.

The square root of 143968549 is about 11998.6894701046. The cubic root of 143968549 is about 524.1101163700.

The spelling of 143968549 in words is "one hundred forty-three million, nine hundred sixty-eight thousand, five hundred forty-nine".