420004240393 has 4 divisors (see below), whose sum is σ = 420180641028. Its totient is φ = 419827839760.

The previous prime is 420004240387. The next prime is 420004240541. The reversal of 420004240393 is 393042400024.

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

It can be written as a sum of positive squares in 2 ways, for example, as 124211838969 + 295792401424 = 352437^2 + 543868^2 .

It is a cyclic number.

It is not a de Polignac number, because 420004240393 - 2⁵ = 420004240361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420004240333) 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, 88196746 + ... + 88201507.

It is an arithmetic number, because the mean of its divisors is an integer number (105045160257).

Almost surely, 2^420004240393 is an apocalyptic number.

It is an amenable number.

420004240393 is a deficient number, since it is larger than the sum of its proper divisors (176400635).

420004240393 is a wasteful number, since it uses less digits than its factorization.

420004240393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176400634.

The product of its (nonzero) digits is 20736, while the sum is 31.

The spelling of 420004240393 in words is "four hundred twenty billion, four million, two hundred forty thousand, three hundred ninety-three".