813873 has 8 divisors (see below), whose sum is σ = 1100736. Its totient is φ = 534800.

The previous prime is 813871. The next prime is 813893. The reversal of 813873 is 378318.

813873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 813873 - 2¹ = 813871 is a prime.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 813873.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 813873.

It is not an unprimeable number, because it can be changed into a prime (813871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1698 + ... + 2123.

It is an arithmetic number, because the mean of its divisors is an integer number (137592).

2⁸¹³⁸⁷³ is an apocalyptic number.

It is an amenable number.

813873 is a deficient number, since it is larger than the sum of its proper divisors (286863).

813873 is a wasteful number, since it uses less digits than its factorization.

813873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3895.

The product of its digits is 4032, while the sum is 30.

The square root of 813873 is about 902.1491007588. The cubic root of 813873 is about 93.3653107548.

The spelling of 813873 in words is "eight hundred thirteen thousand, eight hundred seventy-three".