1143431299 has 2 divisors, whose sum is σ = 1143431300. Its totient is φ = 1143431298.

The previous prime is 1143431297. The next prime is 1143431321. The reversal of 1143431299 is 9921343411.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1143431299 - 2¹ = 1143431297 is a prime.

Together with 1143431297, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1143431291) 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, 571715649 + 571715650.

It is an arithmetic number, because the mean of its divisors is an integer number (571715650).

Almost surely, 2^1143431299 is an apocalyptic number.

1143431299 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143431299 is an equidigital number, since it uses as much as digits as its factorization.

1143431299 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 37.

The square root of 1143431299 is about 33814.6610067290. The cubic root of 1143431299 is about 1045.6909722419.

The spelling of 1143431299 in words is "one billion, one hundred forty-three million, four hundred thirty-one thousand, two hundred ninety-nine".