423508279 has 2 divisors, whose sum is σ = 423508280. Its totient is φ = 423508278.

The previous prime is 423508277. The next prime is 423508289. The reversal of 423508279 is 972805324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423508279 - 2¹ = 423508277 is a prime.

Together with 423508277, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423508277) 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, 211754139 + 211754140.

It is an arithmetic number, because the mean of its divisors is an integer number (211754140).

Almost surely, 2^423508279 is an apocalyptic number.

423508279 is a deficient number, since it is larger than the sum of its proper divisors (1).

423508279 is an equidigital number, since it uses as much as digits as its factorization.

423508279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 423508279 is about 20579.3167768029. The cubic root of 423508279 is about 750.9666226893.

The spelling of 423508279 in words is "four hundred twenty-three million, five hundred eight thousand, two hundred seventy-nine".