1123320997 has 4 divisors (see below), whose sum is σ = 1123391340. Its totient is φ = 1123250656.

The previous prime is 1123320967. The next prime is 1123321049. The reversal of 1123320997 is 7990233211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 898140961 + 225180036 = 29969^2 + 15006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123320997 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 (1123320967) 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, 1593 + ... + 47425.

It is an arithmetic number, because the mean of its divisors is an integer number (280847835).

Almost surely, 2^1123320997 is an apocalyptic number.

It is an amenable number.

1123320997 is a deficient number, since it is larger than the sum of its proper divisors (70343).

1123320997 is an equidigital number, since it uses as much as digits as its factorization.

1123320997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70342.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 1123320997 is about 33515.9812179205. The cubic root of 1123320997 is about 1039.5242513983.

The spelling of 1123320997 in words is "one billion, one hundred twenty-three million, three hundred twenty thousand, nine hundred ninety-seven".