1121173747 has 4 divisors (see below), whose sum is σ = 1121247880. Its totient is φ = 1121099616.

The previous prime is 1121173733. The next prime is 1121173751. The reversal of 1121173747 is 7473711211.

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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121173747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121173777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5313 + ... + 47650.

It is an arithmetic number, because the mean of its divisors is an integer number (280311970).

Almost surely, 2^1121173747 is an apocalyptic number.

1121173747 is a deficient number, since it is larger than the sum of its proper divisors (74133).

1121173747 is an equidigital number, since it uses as much as digits as its factorization.

1121173747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74132.

The product of its digits is 8232, while the sum is 34.

The square root of 1121173747 is about 33483.9326692669. The cubic root of 1121173747 is about 1038.8614719514.

Adding to 1121173747 its reverse (7473711211), we get a palindrome (8594884958).

The spelling of 1121173747 in words is "one billion, one hundred twenty-one million, one hundred seventy-three thousand, seven hundred forty-seven".