813801 has 8 divisors (see below), whose sum is σ = 1103104. Its totient is φ = 533520.

The previous prime is 813797. The next prime is 813811. The reversal of 813801 is 108318.

It is a happy number.

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

It is not a de Polignac number, because 813801 - 2² = 813797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 813801.

It is not an unprimeable number, because it can be changed into a prime (813811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2041 + ... + 2406.

It is an arithmetic number, because the mean of its divisors is an integer number (137888).

2⁸¹³⁸⁰¹ is an apocalyptic number.

It is an amenable number.

813801 is a deficient number, since it is larger than the sum of its proper divisors (289303).

813801 is a wasteful number, since it uses less digits than its factorization.

813801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4511.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 813801 is about 902.1091951643. The cubic root of 813801 is about 93.3625574585.

The spelling of 813801 in words is "eight hundred thirteen thousand, eight hundred one".