1166178947 has 2 divisors, whose sum is σ = 1166178948. Its totient is φ = 1166178946.

The previous prime is 1166178929. The next prime is 1166178989. The reversal of 1166178947 is 7498716611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1166178947 - 2¹² = 1166174851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1166178895 and 1166178904.

It is not a weakly prime, because it can be changed into another prime (1166178347) 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, 583089473 + 583089474.

It is an arithmetic number, because the mean of its divisors is an integer number (583089474).

Almost surely, 2^1166178947 is an apocalyptic number.

1166178947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166178947 is an equidigital number, since it uses as much as digits as its factorization.

1166178947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 50.

The square root of 1166178947 is about 34149.3623220112. The cubic root of 1166178947 is about 1052.5798833153.

The spelling of 1166178947 in words is "one billion, one hundred sixty-six million, one hundred seventy-eight thousand, nine hundred forty-seven".