1161326917 has 2 divisors, whose sum is σ = 1161326918. Its totient is φ = 1161326916.

The previous prime is 1161326893. The next prime is 1161326923. The reversal of 1161326917 is 7196231611.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 914397121 + 246929796 = 30239^2 + 15714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1161326917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1161326977) 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 as a sum of consecutive naturals, namely, 580663458 + 580663459.

It is an arithmetic number, because the mean of its divisors is an integer number (580663459).

Almost surely, 2^1161326917 is an apocalyptic number.

It is an amenable number.

1161326917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161326917 is an equidigital number, since it uses as much as digits as its factorization.

1161326917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 37.

The square root of 1161326917 is about 34078.2469766272. The cubic root of 1161326917 is about 1051.1180583313.

The spelling of 1161326917 in words is "one billion, one hundred sixty-one million, three hundred twenty-six thousand, nine hundred seventeen".