811673 has 4 divisors (see below), whose sum is σ = 837888. Its totient is φ = 785460.

The previous prime is 811667. The next prime is 811691. The reversal of 811673 is 376118.

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 a de Polignac number, because none of the positive numbers 2^k-811673 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 (811273) 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, 13061 + ... + 13122.

It is an arithmetic number, because the mean of its divisors is an integer number (209472).

2⁸¹¹⁶⁷³ is an apocalyptic number.

It is an amenable number.

811673 is a deficient number, since it is larger than the sum of its proper divisors (26215).

811673 is a wasteful number, since it uses less digits than its factorization.

811673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26214.

The product of its digits is 1008, while the sum is 26.

The square root of 811673 is about 900.9289650133. The cubic root of 811673 is about 93.2811088219.

The spelling of 811673 in words is "eight hundred eleven thousand, six hundred seventy-three".