423789173 has 2 divisors, whose sum is σ = 423789174. Its totient is φ = 423789172.

The previous prime is 423789169. The next prime is 423789181. The reversal of 423789173 is 371987324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 338817649 + 84971524 = 18407^2 + 9218^2 .

It is a cyclic number.

It is not a de Polignac number, because 423789173 - 2² = 423789169 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423789103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211894586 + 211894587.

It is an arithmetic number, because the mean of its divisors is an integer number (211894587).

Almost surely, 2^423789173 is an apocalyptic number.

It is an amenable number.

423789173 is a deficient number, since it is larger than the sum of its proper divisors (1).

423789173 is an equidigital number, since it uses as much as digits as its factorization.

423789173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 44.

The square root of 423789173 is about 20586.1403133273. The cubic root of 423789173 is about 751.1326134621.

The spelling of 423789173 in words is "four hundred twenty-three million, seven hundred eighty-nine thousand, one hundred seventy-three".