423945438171 has 4 divisors (see below), whose sum is σ = 565260584232. Its totient is φ = 282630292112.

The previous prime is 423945438149. The next prime is 423945438209. The reversal of 423945438171 is 171834549324.

It is a happy number.

423945438171 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 423945438171 - 2²⁹ = 423408567259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (423945436171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70657573026 + ... + 70657573031.

It is an arithmetic number, because the mean of its divisors is an integer number (141315146058).

Almost surely, 2^423945438171 is an apocalyptic number.

423945438171 is a deficient number, since it is larger than the sum of its proper divisors (141315146061).

423945438171 is a wasteful number, since it uses less digits than its factorization.

423945438171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141315146060.

The product of its digits is 2903040, while the sum is 51.

The spelling of 423945438171 in words is "four hundred twenty-three billion, nine hundred forty-five million, four hundred thirty-eight thousand, one hundred seventy-one".