1161331017 has 72 divisors (see below), whose sum is σ = 2001384000. Its totient is φ = 596756160.

The previous prime is 1161331001. The next prime is 1161331049. The reversal of 1161331017 is 7101331611.

It is not a de Polignac number, because 1161331017 - 2⁴ = 1161331001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1161331097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1938484 + ... + 1939082.

It is an arithmetic number, because the mean of its divisors is an integer number (27797000).

Almost surely, 2^1161331017 is an apocalyptic number.

It is an amenable number.

1161331017 is a deficient number, since it is larger than the sum of its proper divisors (840052983).

1161331017 is a wasteful number, since it uses less digits than its factorization.

1161331017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747 (or 729 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 24.

The square root of 1161331017 is about 34078.3071322506. The cubic root of 1161331017 is about 1051.1192953011.

Adding to 1161331017 its reverse (7101331611), we get a palindrome (8262662628).

The spelling of 1161331017 in words is "one billion, one hundred sixty-one million, three hundred thirty-one thousand, seventeen".