423464638673 has 2 divisors, whose sum is σ = 423464638674. Its totient is φ = 423464638672.

The previous prime is 423464638657. The next prime is 423464638687. The reversal of 423464638673 is 376836464324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 280737843409 + 142726795264 = 529847^2 + 377792^2 .

It is a cyclic number.

It is not a de Polignac number, because 423464638673 - 2⁴ = 423464638657 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (423464631673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211732319336 + 211732319337.

It is an arithmetic number, because the mean of its divisors is an integer number (211732319337).

Almost surely, 2^423464638673 is an apocalyptic number.

It is an amenable number.

423464638673 is a deficient number, since it is larger than the sum of its proper divisors (1).

423464638673 is an equidigital number, since it uses as much as digits as its factorization.

423464638673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41803776, while the sum is 56.

The spelling of 423464638673 in words is "four hundred twenty-three billion, four hundred sixty-four million, six hundred thirty-eight thousand, six hundred seventy-three".