117788081 has 2 divisors, whose sum is σ = 117788082. Its totient is φ = 117788080.

The previous prime is 117788071. The next prime is 117788113. The reversal of 117788081 is 180887711.

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., 66178225 + 51609856 = 8135^2 + 7184^2 .

It is an emirp because it is prime and its reverse (180887711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117788081 - 2⁶ = 117788017 is a prime.

It is a super-2 number, since 2×117788081² = 27748064051325122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (117788071) 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, 58894040 + 58894041.

It is an arithmetic number, because the mean of its divisors is an integer number (58894041).

Almost surely, 2^117788081 is an apocalyptic number.

It is an amenable number.

117788081 is a deficient number, since it is larger than the sum of its proper divisors (1).

117788081 is an equidigital number, since it uses as much as digits as its factorization.

117788081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25088, while the sum is 41.

The square root of 117788081 is about 10853.0217451178. The cubic root of 117788081 is about 490.1930115649.

The spelling of 117788081 in words is "one hundred seventeen million, seven hundred eighty-eight thousand, eighty-one".