118872181 has 2 divisors, whose sum is σ = 118872182. Its totient is φ = 118872180.

The previous prime is 118872179. The next prime is 118872203. The reversal of 118872181 is 181278811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108368100 + 10504081 = 10410^2 + 3241^2 .

It is a cyclic number.

It is not a de Polignac number, because 118872181 - 2¹ = 118872179 is a prime.

It is a super-2 number, since 2×118872181² = 28261190831393522, which contains 22 as substring.

Together with 118872179, 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 118872181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118872121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59436090 + 59436091.

It is an arithmetic number, because the mean of its divisors is an integer number (59436091).

Almost surely, 2^118872181 is an apocalyptic number.

It is an amenable number.

118872181 is a deficient number, since it is larger than the sum of its proper divisors (1).

118872181 is an equidigital number, since it uses as much as digits as its factorization.

118872181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7168, while the sum is 37.

The square root of 118872181 is about 10902.8519663435. The cubic root of 118872181 is about 491.6923035309.

The spelling of 118872181 in words is "one hundred eighteen million, eight hundred seventy-two thousand, one hundred eighty-one".