1186546681 has 2 divisors, whose sum is σ = 1186546682. Its totient is φ = 1186546680.

The previous prime is 1186546679. The next prime is 1186546693. The reversal of 1186546681 is 1866456811.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 811737081 + 374809600 = 28491^2 + 19360^2 .

It is a cyclic number.

It is not a de Polignac number, because 1186546681 - 2¹ = 1186546679 is a prime.

It is a super-2 number, since 2×1186546681² = 2815786052384231522, which contains 22 as substring.

Together with 1186546679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1186546381) 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 as a sum of consecutive naturals, namely, 593273340 + 593273341.

It is an arithmetic number, because the mean of its divisors is an integer number (593273341).

Almost surely, 2^1186546681 is an apocalyptic number.

It is an amenable number.

1186546681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1186546681 is an equidigital number, since it uses as much as digits as its factorization.

1186546681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 46.

The square root of 1186546681 is about 34446.2868971389. The cubic root of 1186546681 is about 1058.6724453850.

The spelling of 1186546681 in words is "one billion, one hundred eighty-six million, five hundred forty-six thousand, six hundred eighty-one".