181120153 has 2 divisors, whose sum is σ = 181120154. Its totient is φ = 181120152.

The previous prime is 181120151. The next prime is 181120189. The reversal of 181120153 is 351021181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148766809 + 32353344 = 12197^2 + 5688^2 .

It is a cyclic number.

It is not a de Polignac number, because 181120153 - 2¹ = 181120151 is a prime.

Together with 181120151, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (181120151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90560076 + 90560077.

It is an arithmetic number, because the mean of its divisors is an integer number (90560077).

Almost surely, 2^181120153 is an apocalyptic number.

It is an amenable number.

181120153 is a deficient number, since it is larger than the sum of its proper divisors (1).

181120153 is an equidigital number, since it uses as much as digits as its factorization.

181120153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 181120153 is about 13458.0887573236. The cubic root of 181120153 is about 565.7904231843.

The spelling of 181120153 in words is "one hundred eighty-one million, one hundred twenty thousand, one hundred fifty-three".