1123203705 has 32 divisors (see below), whose sum is σ = 1937139456. Its totient is φ = 552455424.

The previous prime is 1123203703. The next prime is 1123203721. The reversal of 1123203705 is 5073023211.

It is not a de Polignac number, because 1123203705 - 2¹ = 1123203703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1123203701) 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 31 ways as a sum of consecutive naturals, for example, 299019 + ... + 302751.

It is an arithmetic number, because the mean of its divisors is an integer number (60535608).

Almost surely, 2^1123203705 is an apocalyptic number.

1123203705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1123203705 is a deficient number, since it is larger than the sum of its proper divisors (813935751).

1123203705 is a wasteful number, since it uses less digits than its factorization.

1123203705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5297.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 1123203705 is about 33514.2313801167. The cubic root of 1123203705 is about 1039.4880693622.

Adding to 1123203705 its reverse (5073023211), we get a palindrome (6196226916).

The spelling of 1123203705 in words is "one billion, one hundred twenty-three million, two hundred three thousand, seven hundred five".