1143691243 has 4 divisors (see below), whose sum is σ = 1143761920. Its totient is φ = 1143620568.

The previous prime is 1143691231. The next prime is 1143691271. The reversal of 1143691243 is 3421963411.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1143691243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1143691199 and 1143691208.

It is not an unprimeable number, because it can be changed into a prime (1143691343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2293 + ... + 47881.

It is an arithmetic number, because the mean of its divisors is an integer number (285940480).

Almost surely, 2^1143691243 is an apocalyptic number.

1143691243 is a deficient number, since it is larger than the sum of its proper divisors (70677).

1143691243 is an equidigital number, since it uses as much as digits as its factorization.

1143691243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70676.

The product of its digits is 15552, while the sum is 34.

The square root of 1143691243 is about 33818.5044465305. The cubic root of 1143691243 is about 1045.7702075805.

The spelling of 1143691243 in words is "one billion, one hundred forty-three million, six hundred ninety-one thousand, two hundred forty-three".