1112791289 has 4 divisors (see below), whose sum is σ = 1112883024. Its totient is φ = 1112699556.

The previous prime is 1112791261. The next prime is 1112791319. The reversal of 1112791289 is 9821972111.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1112791289 - 2²⁰ = 1111742713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1112731289) 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, 24287 + ... + 53060.

It is an arithmetic number, because the mean of its divisors is an integer number (278220756).

Almost surely, 2^1112791289 is an apocalyptic number.

It is an amenable number.

1112791289 is a deficient number, since it is larger than the sum of its proper divisors (91735).

1112791289 is an equidigital number, since it uses as much as digits as its factorization.

1112791289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91734.

The product of its digits is 18144, while the sum is 41.

The square root of 1112791289 is about 33358.5264812461. The cubic root of 1112791289 is about 1036.2659760560.

The spelling of 1112791289 in words is "one billion, one hundred twelve million, seven hundred ninety-one thousand, two hundred eighty-nine".