872844403 has 4 divisors (see below), whose sum is σ = 873555840. Its totient is φ = 872132968.

The previous prime is 872844397. The next prime is 872844419. The reversal of 872844403 is 304448278.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304448278 = 2 ⋅152224139.

It is a cyclic number.

It is not a de Polignac number, because 872844403 - 2⁹ = 872843891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (872844433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353875 + ... + 356332.

It is an arithmetic number, because the mean of its divisors is an integer number (218388960).

Almost surely, 2^872844403 is an apocalyptic number.

872844403 is a deficient number, since it is larger than the sum of its proper divisors (711437).

872844403 is a wasteful number, since it uses less digits than its factorization.

872844403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711436.

The product of its (nonzero) digits is 172032, while the sum is 40.

The square root of 872844403 is about 29543.9402077651. The cubic root of 872844403 is about 955.6795152904.

The spelling of 872844403 in words is "eight hundred seventy-two million, eight hundred forty-four thousand, four hundred three".