119808181 has 2 divisors, whose sum is σ = 119808182. Its totient is φ = 119808180.

The previous prime is 119808179. The next prime is 119808187. The reversal of 119808181 is 181808911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102718225 + 17089956 = 10135^2 + 4134^2 .

It is an emirp because it is prime and its reverse (181808911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 119808181 - 2¹ = 119808179 is a prime.

It is a super-2 number, since 2×119808181² = 28708000469057522, which contains 22 as substring.

Together with 119808179, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 119808181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (119808187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59904090 + 59904091.

It is an arithmetic number, because the mean of its divisors is an integer number (59904091).

Almost surely, 2^119808181 is an apocalyptic number.

It is an amenable number.

119808181 is a deficient number, since it is larger than the sum of its proper divisors (1).

119808181 is an equidigital number, since it uses as much as digits as its factorization.

119808181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 37.

The square root of 119808181 is about 10945.6923490476. The cubic root of 119808181 is about 492.9794600760.

The spelling of 119808181 in words is "one hundred nineteen million, eight hundred eight thousand, one hundred eighty-one".