1181660797 has 2 divisors, whose sum is σ = 1181660798. Its totient is φ = 1181660796.

The previous prime is 1181660747. The next prime is 1181660801. The reversal of 1181660797 is 7970661811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1068897636 + 112763161 = 32694^2 + 10619^2 .

It is a cyclic number.

It is not a de Polignac number, because 1181660797 - 2¹⁵ = 1181628029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1181660747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 590830398 + 590830399.

It is an arithmetic number, because the mean of its divisors is an integer number (590830399).

Almost surely, 2^1181660797 is an apocalyptic number.

It is an amenable number.

1181660797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1181660797 is an equidigital number, since it uses as much as digits as its factorization.

1181660797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 46.

The square root of 1181660797 is about 34375.2934096569. The cubic root of 1181660797 is about 1057.2173356784.

The spelling of 1181660797 in words is "one billion, one hundred eighty-one million, six hundred sixty thousand, seven hundred ninety-seven".