1171678117 has 2 divisors, whose sum is σ = 1171678118. Its totient is φ = 1171678116.

The previous prime is 1171678093. The next prime is 1171678171. The reversal of 1171678117 is 7118761711.

Together with next prime (1171678171) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1118300481 + 53377636 = 33441^2 + 7306^2 .

It is a cyclic number.

It is not a de Polignac number, because 1171678117 - 2⁷ = 1171677989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1171678117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1171678177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 585839058 + 585839059.

It is an arithmetic number, because the mean of its divisors is an integer number (585839059).

Almost surely, 2^1171678117 is an apocalyptic number.

It is an amenable number.

1171678117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1171678117 is an equidigital number, since it uses as much as digits as its factorization.

1171678117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16464, while the sum is 40.

The square root of 1171678117 is about 34229.7840630057. The cubic root of 1171678117 is about 1054.2317856347.

The spelling of 1171678117 in words is "one billion, one hundred seventy-one million, six hundred seventy-eight thousand, one hundred seventeen".