813723873 has 16 divisors (see below), whose sum is σ = 1117036800. Its totient is φ = 526602384.

The previous prime is 813723871. The next prime is 813723947. The reversal of 813723873 is 378327318.

It is not a de Polignac number, because 813723873 - 2¹ = 813723871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (813723871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1678 + ... + 40376.

It is an arithmetic number, because the mean of its divisors is an integer number (69814800).

Almost surely, 2^813723873 is an apocalyptic number.

It is an amenable number.

813723873 is a deficient number, since it is larger than the sum of its proper divisors (303312927).

813723873 is a wasteful number, since it uses less digits than its factorization.

813723873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38908.

The product of its digits is 169344, while the sum is 42.

The square root of 813723873 is about 28525.8457017491. The cubic root of 813723873 is about 933.5960792437.

The spelling of 813723873 in words is "eight hundred thirteen million, seven hundred twenty-three thousand, eight hundred seventy-three".