13181423 has 2 divisors, whose sum is σ = 13181424. Its totient is φ = 13181422.

The previous prime is 13181419. The next prime is 13181453. The reversal of 13181423 is 32418131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13181423 - 2² = 13181419 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13181453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6590711 + 6590712.

It is an arithmetic number, because the mean of its divisors is an integer number (6590712).

Almost surely, 2^13181423 is an apocalyptic number.

13181423 is a deficient number, since it is larger than the sum of its proper divisors (1).

13181423 is an equidigital number, since it uses as much as digits as its factorization.

13181423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 23.

The square root of 13181423 is about 3630.6229493022. The cubic root of 13181423 is about 236.2222303427. Note that the first 4 decimals are identical.

Adding to 13181423 its reverse (32418131), we get a palindrome (45599554).

The spelling of 13181423 in words is "thirteen million, one hundred eighty-one thousand, four hundred twenty-three".