423129884209 has 2 divisors, whose sum is σ = 423129884210. Its totient is φ = 423129884208.

The previous prime is 423129884207. The next prime is 423129884249. The reversal of 423129884209 is 902488921324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 419770522609 + 3359361600 = 647897^2 + 57960^2 .

It is a cyclic number.

It is not a de Polignac number, because 423129884209 - 2¹ = 423129884207 is a prime.

Together with 423129884207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (423129884207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211564942104 + 211564942105.

It is an arithmetic number, because the mean of its divisors is an integer number (211564942105).

Almost surely, 2^423129884209 is an apocalyptic number.

It is an amenable number.

423129884209 is a deficient number, since it is larger than the sum of its proper divisors (1).

423129884209 is an equidigital number, since it uses as much as digits as its factorization.

423129884209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1990656, while the sum is 52.

The spelling of 423129884209 in words is "four hundred twenty-three billion, one hundred twenty-nine million, eight hundred eighty-four thousand, two hundred nine".