423508291 has 2 divisors, whose sum is σ = 423508292. Its totient is φ = 423508290.

The previous prime is 423508289. The next prime is 423508321. The reversal of 423508291 is 192805324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423508291 - 2¹ = 423508289 is a prime.

Together with 423508289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (423508201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211754145 + 211754146.

It is an arithmetic number, because the mean of its divisors is an integer number (211754146).

Almost surely, 2^423508291 is an apocalyptic number.

423508291 is a deficient number, since it is larger than the sum of its proper divisors (1).

423508291 is an equidigital number, since it uses as much as digits as its factorization.

423508291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 423508291 is about 20579.3170683577. The cubic root of 423508291 is about 750.9666297821.

The spelling of 423508291 in words is "four hundred twenty-three million, five hundred eight thousand, two hundred ninety-one".