181128413 has 2 divisors, whose sum is σ = 181128414. Its totient is φ = 181128412.

The previous prime is 181128373. The next prime is 181128469. The reversal of 181128413 is 314821181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135187129 + 45941284 = 11627^2 + 6778^2 .

It is a cyclic number.

It is not a de Polignac number, because 181128413 - 2¹⁸ = 180866269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181122413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90564206 + 90564207.

It is an arithmetic number, because the mean of its divisors is an integer number (90564207).

Almost surely, 2^181128413 is an apocalyptic number.

It is an amenable number.

181128413 is a deficient number, since it is larger than the sum of its proper divisors (1).

181128413 is an equidigital number, since it uses as much as digits as its factorization.

181128413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 29.

The square root of 181128413 is about 13458.3956324667. The cubic root of 181128413 is about 565.7990240270.

Adding to 181128413 its reverse (314821181), we get a palindrome (495949594).

The spelling of 181128413 in words is "one hundred eighty-one million, one hundred twenty-eight thousand, four hundred thirteen".