1121996563 has 4 divisors (see below), whose sum is σ = 1122794280. Its totient is φ = 1121198848.

The previous prime is 1121996537. The next prime is 1121996593. The reversal of 1121996563 is 3656991211.

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-1121996563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121996593) 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, 396745 + ... + 399562.

It is an arithmetic number, because the mean of its divisors is an integer number (280698570).

Almost surely, 2^1121996563 is an apocalyptic number.

1121996563 is a deficient number, since it is larger than the sum of its proper divisors (797717).

1121996563 is an equidigital number, since it uses as much as digits as its factorization.

1121996563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797716.

The product of its digits is 87480, while the sum is 43.

The square root of 1121996563 is about 33496.2171446269. The cubic root of 1121996563 is about 1039.1155458096.

The spelling of 1121996563 in words is "one billion, one hundred twenty-one million, nine hundred ninety-six thousand, five hundred sixty-three".