423344191 has 2 divisors, whose sum is σ = 423344192. Its totient is φ = 423344190.

The previous prime is 423344179. The next prime is 423344219. The reversal of 423344191 is 191443324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423344191 - 2¹⁵ = 423311423 is a prime.

It is a Chen prime.

It is equal to p_22512946 and since 423344191 and 22512946 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 (423344101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211672095 + 211672096.

It is an arithmetic number, because the mean of its divisors is an integer number (211672096).

Almost surely, 2^423344191 is an apocalyptic number.

423344191 is a deficient number, since it is larger than the sum of its proper divisors (1).

423344191 is an equidigital number, since it uses as much as digits as its factorization.

423344191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 31.

The square root of 423344191 is about 20575.3296692908. The cubic root of 423344191 is about 750.8696229885.

The spelling of 423344191 in words is "four hundred twenty-three million, three hundred forty-four thousand, one hundred ninety-one".