420071307673 has 4 divisors (see below), whose sum is σ = 420258590928. Its totient is φ = 419884024420.

The previous prime is 420071307647. The next prime is 420071307679. The reversal of 420071307673 is 376703170024.

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 420071307673 - 2⁵ = 420071307641 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420071307679) 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, 93638263 + ... + 93642748.

It is an arithmetic number, because the mean of its divisors is an integer number (105064647732).

Almost surely, 2^420071307673 is an apocalyptic number.

It is an amenable number.

420071307673 is a deficient number, since it is larger than the sum of its proper divisors (187283255).

420071307673 is a wasteful number, since it uses less digits than its factorization.

420071307673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187283254.

The product of its (nonzero) digits is 148176, while the sum is 40.

Adding to 420071307673 its reverse (376703170024), we get a palindrome (796774477697).

The spelling of 420071307673 in words is "four hundred twenty billion, seventy-one million, three hundred seven thousand, six hundred seventy-three".