1123902643 has 4 divisors (see below), whose sum is σ = 1124545528. Its totient is φ = 1123259760.

The previous prime is 1123902607. The next prime is 1123902673. The reversal of 1123902643 is 3462093211.

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

It is a cyclic number.

It is not a de Polignac number, because 1123902643 - 2²⁵ = 1090348211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123902673) 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, 318813 + ... + 322318.

It is an arithmetic number, because the mean of its divisors is an integer number (281136382).

Almost surely, 2^1123902643 is an apocalyptic number.

1123902643 is a deficient number, since it is larger than the sum of its proper divisors (642885).

1123902643 is an equidigital number, since it uses as much as digits as its factorization.

1123902643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642884.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 1123902643 is about 33524.6572391128. The cubic root of 1123902643 is about 1039.7036393607.

Adding to 1123902643 its reverse (3462093211), we get a palindrome (4585995854).

The spelling of 1123902643 in words is "one billion, one hundred twenty-three million, nine hundred two thousand, six hundred forty-three".