1121304689 has 4 divisors (see below), whose sum is σ = 1157475840. Its totient is φ = 1085133540.

The previous prime is 1121304677. The next prime is 1121304719. The reversal of 1121304689 is 9864031211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9864031211 = 26161 ⋅377051.

It is a cyclic number.

It is not a de Polignac number, because 1121304689 - 2⁴ = 1121304673 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1121304619) 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, 18085529 + ... + 18085590.

It is an arithmetic number, because the mean of its divisors is an integer number (289368960).

Almost surely, 2^1121304689 is an apocalyptic number.

It is an amenable number.

1121304689 is a deficient number, since it is larger than the sum of its proper divisors (36171151).

1121304689 is an equidigital number, since it uses as much as digits as its factorization.

1121304689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36171150.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 1121304689 is about 33485.8879081920. The cubic root of 1121304689 is about 1038.9019132906.

The spelling of 1121304689 in words is "one billion, one hundred twenty-one million, three hundred four thousand, six hundred eighty-nine".