143249969 has 2 divisors, whose sum is σ = 143249970. Its totient is φ = 143249968.

The previous prime is 143249959. The next prime is 143249999. The reversal of 143249969 is 969942341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139594225 + 3655744 = 11815^2 + 1912^2 .

It is a cyclic number.

It is not a de Polignac number, because 143249969 - 2²⁰ = 142201393 is a prime.

It is a super-2 number, since 2×143249969² = 41041107237001922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (143249959) 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, 71624984 + 71624985.

It is an arithmetic number, because the mean of its divisors is an integer number (71624985).

Almost surely, 2^143249969 is an apocalyptic number.

It is an amenable number.

143249969 is a deficient number, since it is larger than the sum of its proper divisors (1).

143249969 is an equidigital number, since it uses as much as digits as its factorization.

143249969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 47.

The square root of 143249969 is about 11968.7079085422. The cubic root of 143249969 is about 523.2366770344.

The spelling of 143249969 in words is "one hundred forty-three million, two hundred forty-nine thousand, nine hundred sixty-nine".