1100123443 has 4 divisors (see below), whose sum is σ = 1135611328. Its totient is φ = 1064635560.

The previous prime is 1100123429. The next prime is 1100123461. The reversal of 1100123443 is 3443210011.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1100123443 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1100123443.

It is not an unprimeable number, because it can be changed into a prime (1100123243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17743896 + ... + 17743957.

It is an arithmetic number, because the mean of its divisors is an integer number (283902832).

Almost surely, 2^1100123443 is an apocalyptic number.

1100123443 is a deficient number, since it is larger than the sum of its proper divisors (35487885).

1100123443 is an equidigital number, since it uses as much as digits as its factorization.

1100123443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35487884.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1100123443 is about 33168.1088245923. The cubic root of 1100123443 is about 1032.3187284830.

Adding to 1100123443 its reverse (3443210011), we get a palindrome (4543333454).

The spelling of 1100123443 in words is "one billion, one hundred million, one hundred twenty-three thousand, four hundred forty-three".