423198631 has 2 divisors, whose sum is σ = 423198632. Its totient is φ = 423198630.

The previous prime is 423198623. The next prime is 423198667. The reversal of 423198631 is 136891324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423198631 - 2³ = 423198623 is a prime.

It is a super-2 number, since 2×423198631² = 358194162560548322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423198031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211599315 + 211599316.

It is an arithmetic number, because the mean of its divisors is an integer number (211599316).

Almost surely, 2^423198631 is an apocalyptic number.

423198631 is a deficient number, since it is larger than the sum of its proper divisors (1).

423198631 is an equidigital number, since it uses as much as digits as its factorization.

423198631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 37.

The square root of 423198631 is about 20571.7921193074. The cubic root of 423198631 is about 750.7835550295.

The spelling of 423198631 in words is "four hundred twenty-three million, one hundred ninety-eight thousand, six hundred thirty-one".