423191 has 2 divisors, whose sum is σ = 423192. Its totient is φ = 423190.

The previous prime is 423179. The next prime is 423209. The reversal of 423191 is 191324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423191 - 2⁶ = 423127 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is equal to p₃₅₆₃₃ and since 423191 and 35633 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211595 + 211596.

It is an arithmetic number, because the mean of its divisors is an integer number (211596).

2⁴²³¹⁹¹ is an apocalyptic number.

423191 is a deficient number, since it is larger than the sum of its proper divisors (1).

423191 is an equidigital number, since it uses as much as digits as its factorization.

423191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 20.

The square root of 423191 is about 650.5313213059. The cubic root of 423191 is about 75.0779042362.

The spelling of 423191 in words is "four hundred twenty-three thousand, one hundred ninety-one".