1131749871 has 16 divisors (see below), whose sum is σ = 1725043200. Its totient is φ = 646537248.

The previous prime is 1131749851. The next prime is 1131749881. The reversal of 1131749871 is 1789471311.

It is not a de Polignac number, because 1131749871 - 2¹⁰ = 1131748847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131749851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136225 + ... + 144293.

It is an arithmetic number, because the mean of its divisors is an integer number (107815200).

Almost surely, 2^1131749871 is an apocalyptic number.

1131749871 is a deficient number, since it is larger than the sum of its proper divisors (593293329).

1131749871 is an equidigital number, since it uses as much as digits as its factorization.

1131749871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14758.

The product of its digits is 42336, while the sum is 42.

The square root of 1131749871 is about 33641.4903207334. The cubic root of 1131749871 is about 1042.1178093989.

The spelling of 1131749871 in words is "one billion, one hundred thirty-one million, seven hundred forty-nine thousand, eight hundred seventy-one".