181116773 has 2 divisors, whose sum is σ = 181116774. Its totient is φ = 181116772.

The previous prime is 181116763. The next prime is 181116779. The reversal of 181116773 is 377611181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110523169 + 70593604 = 10513^2 + 8402^2 .

It is an emirp because it is prime and its reverse (377611181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 181116773 - 2⁴ = 181116757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181116779) 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, 90558386 + 90558387.

It is an arithmetic number, because the mean of its divisors is an integer number (90558387).

Almost surely, 2^181116773 is an apocalyptic number.

It is an amenable number.

181116773 is a deficient number, since it is larger than the sum of its proper divisors (1).

181116773 is an equidigital number, since it uses as much as digits as its factorization.

181116773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 35.

The square root of 181116773 is about 13457.9631817003. The cubic root of 181116773 is about 565.7869036357.

The spelling of 181116773 in words is "one hundred eighty-one million, one hundred sixteen thousand, seven hundred seventy-three".