423040203493 has 4 divisors (see below), whose sum is σ = 423041577280. Its totient is φ = 423038829708.

The previous prime is 423040203461. The next prime is 423040203499. The reversal of 423040203493 is 394302040324.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 423040203493 - 2⁵ = 423040203461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423040203499) 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, 12148 + ... + 919906.

It is an arithmetic number, because the mean of its divisors is an integer number (105760394320).

Almost surely, 2^423040203493 is an apocalyptic number.

It is an amenable number.

423040203493 is a deficient number, since it is larger than the sum of its proper divisors (1373787).

423040203493 is an equidigital number, since it uses as much as digits as its factorization.

423040203493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373786.

The product of its (nonzero) digits is 62208, while the sum is 34.

The spelling of 423040203493 in words is "four hundred twenty-three billion, forty million, two hundred three thousand, four hundred ninety-three".