872863486021 has 4 divisors (see below), whose sum is σ = 873148087552. Its totient is φ = 872578884492.

The previous prime is 872863485979. The next prime is 872863486093. The reversal of 872863486021 is 120684368278.

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 872863486021 - 2³³ = 864273551429 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 (872863486921) 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, 142296165 + ... + 142302298.

It is an arithmetic number, because the mean of its divisors is an integer number (218287021888).

Almost surely, 2^872863486021 is an apocalyptic number.

It is an amenable number.

872863486021 is a deficient number, since it is larger than the sum of its proper divisors (284601531).

872863486021 is a wasteful number, since it uses less digits than its factorization.

872863486021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284601530.

The product of its (nonzero) digits is 6193152, while the sum is 55.

The spelling of 872863486021 in words is "eight hundred seventy-two billion, eight hundred sixty-three million, four hundred eighty-six thousand, twenty-one".