423242129 has 2 divisors, whose sum is σ = 423242130. Its totient is φ = 423242128.

The previous prime is 423242107. The next prime is 423242143. The reversal of 423242129 is 921242324.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 422713600 + 528529 = 20560^2 + 727^2 .

It is a cyclic number.

It is not a de Polignac number, because 423242129 - 2¹² = 423238033 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (423242329) 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, 211621064 + 211621065.

It is an arithmetic number, because the mean of its divisors is an integer number (211621065).

Almost surely, 2^423242129 is an apocalyptic number.

It is an amenable number.

423242129 is a deficient number, since it is larger than the sum of its proper divisors (1).

423242129 is an equidigital number, since it uses as much as digits as its factorization.

423242129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 29.

The square root of 423242129 is about 20572.8493165142. The cubic root of 423242129 is about 750.8092769655.

The spelling of 423242129 in words is "four hundred twenty-three million, two hundred forty-two thousand, one hundred twenty-nine".