1121686791 has 8 divisors (see below), whose sum is σ = 1496058480. Its totient is φ = 747553152.

The previous prime is 1121686781. The next prime is 1121686807. The reversal of 1121686791 is 1976861211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1121686791 - 2⁵ = 1121686759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121686711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48210 + ... + 67583.

It is an arithmetic number, because the mean of its divisors is an integer number (187007310).

Almost surely, 2^1121686791 is an apocalyptic number.

1121686791 is a deficient number, since it is larger than the sum of its proper divisors (374371689).

1121686791 is a wasteful number, since it uses less digits than its factorization.

1121686791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119025.

The product of its digits is 36288, while the sum is 42.

The square root of 1121686791 is about 33491.5928405921. The cubic root of 1121686791 is about 1039.0199072134.

The spelling of 1121686791 in words is "one billion, one hundred twenty-one million, six hundred eighty-six thousand, seven hundred ninety-one".