1143899393 has 16 divisors (see below), whose sum is σ = 1408826496. Its totient is φ = 904452480.

The previous prime is 1143899359. The next prime is 1143899423. The reversal of 1143899393 is 3939983411.

It is a cyclic number.

It is not a de Polignac number, because 1143899393 - 2⁶ = 1143899329 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1143899333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170798 + ... + 177368.

It is an arithmetic number, because the mean of its divisors is an integer number (88051656).

Almost surely, 2^1143899393 is an apocalyptic number.

1143899393 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1143899393 is a deficient number, since it is larger than the sum of its proper divisors (264927103).

1143899393 is a wasteful number, since it uses less digits than its factorization.

1143899393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8504.

The product of its digits is 629856, while the sum is 50.

The square root of 1143899393 is about 33821.5817637200. The cubic root of 1143899393 is about 1045.8336465741.

The spelling of 1143899393 in words is "one billion, one hundred forty-three million, eight hundred ninety-nine thousand, three hundred ninety-three".