428673376823 has 4 divisors (see below), whose sum is σ = 428690625120. Its totient is φ = 428656128528.

The previous prime is 428673376793. The next prime is 428673376829. The reversal of 428673376823 is 328673376824.

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 428673376823 - 2²² = 428669182519 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 (428673376829) 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, 8586815 + ... + 8636592.

It is an arithmetic number, because the mean of its divisors is an integer number (107172656280).

Almost surely, 2^428673376823 is an apocalyptic number.

428673376823 is a deficient number, since it is larger than the sum of its proper divisors (17248297).

428673376823 is a wasteful number, since it uses less digits than its factorization.

428673376823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17248296.

The product of its digits is 48771072, while the sum is 59.

Subtracting from 428673376823 its reverse (328673376824), we obtain a palindrome (99999999999).

The spelling of 428673376823 in words is "four hundred twenty-eight billion, six hundred seventy-three million, three hundred seventy-six thousand, eight hundred twenty-three".