1143543879 has 16 divisors (see below), whose sum is σ = 1793795040. Its totient is φ = 717517440.

The previous prime is 1143543857. The next prime is 1143543889. The reversal of 1143543879 is 9783453411.

1143543879 is a `hidden beast` number, since 1 + 143 + 5 + 438 + 79 = 666.

It is not a de Polignac number, because 1143543879 - 2⁸ = 1143543623 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143543889) 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 15 ways as a sum of consecutive naturals, for example, 1245232 + ... + 1246149.

It is an arithmetic number, because the mean of its divisors is an integer number (112112190).

Almost surely, 2^1143543879 is an apocalyptic number.

1143543879 is a deficient number, since it is larger than the sum of its proper divisors (650251161).

1143543879 is a wasteful number, since it uses less digits than its factorization.

1143543879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2491407 (or 2491401 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 1143543879 is about 33816.3256283115. The cubic root of 1143543879 is about 1045.7252900088.

The spelling of 1143543879 in words is "one billion, one hundred forty-three million, five hundred forty-three thousand, eight hundred seventy-nine".