423210173 has 2 divisors, whose sum is σ = 423210174. Its totient is φ = 423210172.

The previous prime is 423210089. The next prime is 423210191. The reversal of 423210173 is 371012324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 364886404 + 58323769 = 19102^2 + 7637^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423210173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423212173) 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, 211605086 + 211605087.

It is an arithmetic number, because the mean of its divisors is an integer number (211605087).

Almost surely, 2^423210173 is an apocalyptic number.

It is an amenable number.

423210173 is a deficient number, since it is larger than the sum of its proper divisors (1).

423210173 is an equidigital number, since it uses as much as digits as its factorization.

423210173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 423210173 is about 20572.0726471593. The cubic root of 423210173 is about 750.7903804021.

Adding to 423210173 its reverse (371012324), we get a palindrome (794222497).

The spelling of 423210173 in words is "four hundred twenty-three million, two hundred ten thousand, one hundred seventy-three".