1130731681 has 6 divisors (see below), whose sum is σ = 1182031970. Its totient is φ = 1081568928.

The previous prime is 1130731649. The next prime is 1130731699. The reversal of 1130731681 is 1861370311.

It can be written as a sum of positive squares in only one way, i.e., 1062173281 + 68558400 = 32591^2 + 8280^2 .

It is not a de Polignac number, because 1130731681 - 2⁵ = 1130731649 is a prime.

It is a super-2 number, since 2×1130731681² = 2557108268834171522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1130731621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1068216 + ... + 1069273.

Almost surely, 2^1130731681 is an apocalyptic number.

It is an amenable number.

1130731681 is a deficient number, since it is larger than the sum of its proper divisors (51300289).

1130731681 is an equidigital number, since it uses as much as digits as its factorization.

1130731681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2137535 (or 2137512 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 1130731681 is about 33626.3539653052. The cubic root of 1130731681 is about 1041.8051984234.

The spelling of 1130731681 in words is "one billion, one hundred thirty million, seven hundred thirty-one thousand, six hundred eighty-one".