143942769 has 12 divisors (see below), whose sum is σ = 208790400. Its totient is φ = 95558904.

The previous prime is 143942761. The next prime is 143942779. The reversal of 143942769 is 967249341.

It is a happy number.

It is not a de Polignac number, because 143942769 - 2³ = 143942761 is a prime.

It is a super-2 number, since 2×143942769² = 41439041494774722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (143942761) 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 in 11 ways as a sum of consecutive naturals, for example, 31309 + ... + 35610.

It is an arithmetic number, because the mean of its divisors is an integer number (17399200).

Almost surely, 2^143942769 is an apocalyptic number.

It is an amenable number.

143942769 is a deficient number, since it is larger than the sum of its proper divisors (64847631).

143942769 is a wasteful number, since it uses less digits than its factorization.

143942769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67164 (or 67161 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 143942769 is about 11997.6151380181. The cubic root of 143942769 is about 524.0788309134.

The spelling of 143942769 in words is "one hundred forty-three million, nine hundred forty-two thousand, seven hundred sixty-nine".