1320891117 has 32 divisors (see below), whose sum is σ = 2183500032. Its totient is φ = 691628544.

The previous prime is 1320891113. The next prime is 1320891151. The reversal of 1320891117 is 7111980231.

It is not a de Polignac number, because 1320891117 - 2² = 1320891113 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320891113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19743 + ... + 55059.

It is an arithmetic number, because the mean of its divisors is an integer number (68234376).

Almost surely, 2^1320891117 is an apocalyptic number.

It is an amenable number.

1320891117 is a deficient number, since it is larger than the sum of its proper divisors (862608915).

1320891117 is a wasteful number, since it uses less digits than its factorization.

1320891117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35477.

The product of its (nonzero) digits is 3024, while the sum is 33.

The square root of 1320891117 is about 36344.0657742086. The cubic root of 1320891117 is about 1097.2081036642.

The spelling of 1320891117 in words is "one billion, three hundred twenty million, eight hundred ninety-one thousand, one hundred seventeen".