1123431143 has 8 divisors (see below), whose sum is σ = 1141065840. Its totient is φ = 1105822080.

The previous prime is 1123431139. The next prime is 1123431151. The reversal of 1123431143 is 3411343211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1123431143 - 2² = 1123431139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123431173) 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 7 ways as a sum of consecutive naturals, for example, 94133 + ... + 105393.

It is an arithmetic number, because the mean of its divisors is an integer number (142633230).

Almost surely, 2^1123431143 is an apocalyptic number.

1123431143 is a deficient number, since it is larger than the sum of its proper divisors (17634697).

1123431143 is a wasteful number, since it uses less digits than its factorization.

1123431143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12817.

The product of its digits is 864, while the sum is 23.

The square root of 1123431143 is about 33517.6243639074. The cubic root of 1123431143 is about 1039.5582267554.

Adding to 1123431143 its reverse (3411343211), we get a palindrome (4534774354).

The spelling of 1123431143 in words is "one billion, one hundred twenty-three million, four hundred thirty-one thousand, one hundred forty-three".