1118631143 has 12 divisors (see below), whose sum is σ = 1306678032. Its totient is φ = 954838080.

The previous prime is 1118631133. The next prime is 1118631169. The reversal of 1118631143 is 3411368111.

It is a happy number.

It is not a de Polignac number, because 1118631143 - 2⁶ = 1118631079 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 (1118631133) 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 11 ways as a sum of consecutive naturals, for example, 35555 + ... + 59172.

It is an arithmetic number, because the mean of its divisors is an integer number (108889836).

Almost surely, 2^1118631143 is an apocalyptic number.

1118631143 is a deficient number, since it is larger than the sum of its proper divisors (188046889).

1118631143 is an equidigital number, since it uses as much as digits as its factorization.

1118631143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94982 (or 94975 counting only the distinct ones).

The product of its digits is 1728, while the sum is 29.

The square root of 1118631143 is about 33445.9435955992. The cubic root of 1118631143 is about 1038.0755656344.

Adding to 1118631143 its reverse (3411368111), we get a palindrome (4529999254).

The spelling of 1118631143 in words is "one billion, one hundred eighteen million, six hundred thirty-one thousand, one hundred forty-three".