423043268491 has 4 divisors (see below), whose sum is σ = 428838381832. Its totient is φ = 417248155152.

The previous prime is 423043268471. The next prime is 423043268503. The reversal of 423043268491 is 194862340324.

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 423043268491 - 2²¹ = 423041171339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423043268471) 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, 2897556561 + ... + 2897556706.

It is an arithmetic number, because the mean of its divisors is an integer number (107209595458).

Almost surely, 2^423043268491 is an apocalyptic number.

423043268491 is a deficient number, since it is larger than the sum of its proper divisors (5795113341).

423043268491 is an equidigital number, since it uses as much as digits as its factorization.

423043268491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5795113340.

The product of its (nonzero) digits is 995328, while the sum is 46.

The spelling of 423043268491 in words is "four hundred twenty-three billion, forty-three million, two hundred sixty-eight thousand, four hundred ninety-one".