181212373 has 2 divisors, whose sum is σ = 181212374. Its totient is φ = 181212372.

The previous prime is 181212221. The next prime is 181212379. The reversal of 181212373 is 373212181.

181212373 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163251729 + 17960644 = 12777^2 + 4238^2 .

It is an emirp because it is prime and its reverse (373212181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 181212373 - 2⁹ = 181211861 is a prime.

It is a super-2 number, since 2×181212373² = 65675848256582258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181212379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90606186 + 90606187.

It is an arithmetic number, because the mean of its divisors is an integer number (90606187).

Almost surely, 2^181212373 is an apocalyptic number.

It is an amenable number.

181212373 is a deficient number, since it is larger than the sum of its proper divisors (1).

181212373 is an equidigital number, since it uses as much as digits as its factorization.

181212373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 28.

The square root of 181212373 is about 13461.5145136051. The cubic root of 181212373 is about 565.8864337402.

The spelling of 181212373 in words is "one hundred eighty-one million, two hundred twelve thousand, three hundred seventy-three".