873442294821 has 16 divisors (see below), whose sum is σ = 1294013635200. Its totient is φ = 582283590624.

The previous prime is 873442294817. The next prime is 873442294831. The reversal of 873442294821 is 128492244378.

873442294821 is a `hidden beast` number, since 8 + 7 + 344 + 2 + 294 + 8 + 2 + 1 = 666.

It is not a de Polignac number, because 873442294821 - 2² = 873442294817 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (873442294831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1249120 + ... + 1818566.

It is an arithmetic number, because the mean of its divisors is an integer number (80875852200).

Almost surely, 2^873442294821 is an apocalyptic number.

It is an amenable number.

873442294821 is a deficient number, since it is larger than the sum of its proper divisors (420571340379).

873442294821 is a wasteful number, since it uses less digits than its factorization.

873442294821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626265 (or 626259 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 54.

The spelling of 873442294821 in words is "eight hundred seventy-three billion, four hundred forty-two million, two hundred ninety-four thousand, eight hundred twenty-one".