423323129 has 2 divisors, whose sum is σ = 423323130. Its totient is φ = 423323128.

The previous prime is 423323113. The next prime is 423323141. The reversal of 423323129 is 921323324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 419430400 + 3892729 = 20480^2 + 1973^2 .

It is a cyclic number.

It is not a de Polignac number, because 423323129 - 2⁴ = 423323113 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 (423323149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211661564 + 211661565.

It is an arithmetic number, because the mean of its divisors is an integer number (211661565).

Almost surely, 2^423323129 is an apocalyptic number.

It is an amenable number.

423323129 is a deficient number, since it is larger than the sum of its proper divisors (1).

423323129 is an equidigital number, since it uses as much as digits as its factorization.

423323129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 29.

The square root of 423323129 is about 20574.8178363746. The cubic root of 423323129 is about 750.8571704903.

The spelling of 423323129 in words is "four hundred twenty-three million, three hundred twenty-three thousand, one hundred twenty-nine".