1171140831 has 12 divisors (see below), whose sum is σ = 1933311952. Its totient is φ = 669223296.

The previous prime is 1171140827. The next prime is 1171140833. The reversal of 1171140831 is 1380411711.

It is not a de Polignac number, because 1171140831 - 2² = 1171140827 is a prime.

It is a super-2 number, since 2×1171140831² = 2743141692070741122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1171140795 and 1171140804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171140833) 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 11 ways as a sum of consecutive naturals, for example, 9294706 + ... + 9294831.

Almost surely, 2^1171140831 is an apocalyptic number.

1171140831 is a deficient number, since it is larger than the sum of its proper divisors (762171121).

1171140831 is a wasteful number, since it uses less digits than its factorization.

1171140831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18589550 (or 18589547 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 27.

The square root of 1171140831 is about 34221.9349394507. The cubic root of 1171140831 is about 1054.0706177698.

The spelling of 1171140831 in words is "one billion, one hundred seventy-one million, one hundred forty thousand, eight hundred thirty-one".