423440894993 has 4 divisors (see below), whose sum is σ = 423445017600. Its totient is φ = 423436772388.

The previous prime is 423440894969. The next prime is 423440894999. The reversal of 423440894993 is 399498044324.

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.

It is a cyclic number.

It is not a de Polignac number, because 423440894993 - 2¹⁰ = 423440893969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423440894999) 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, 1903193 + ... + 2114006.

It is an arithmetic number, because the mean of its divisors is an integer number (105861254400).

Almost surely, 2^423440894993 is an apocalyptic number.

It is an amenable number.

423440894993 is a deficient number, since it is larger than the sum of its proper divisors (4122607).

423440894993 is a wasteful number, since it uses less digits than its factorization.

423440894993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4122606.

The product of its (nonzero) digits is 26873856, while the sum is 59.

The spelling of 423440894993 in words is "four hundred twenty-three billion, four hundred forty million, eight hundred ninety-four thousand, nine hundred ninety-three".