811834 has 4 divisors (see below), whose sum is σ = 1217754. Its totient is φ = 405916.

The previous prime is 811819. The next prime is 811861. The reversal of 811834 is 438118.

811834 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 438118 = 2 ⋅219059.

It can be written as a sum of positive squares in only one way, i.e., 804609 + 7225 = 897^2 + 85^2 .

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 811799 and 811808.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202957 + ... + 202960.

2⁸¹¹⁸³⁴ is an apocalyptic number.

811834 is a deficient number, since it is larger than the sum of its proper divisors (405920).

811834 is a wasteful number, since it uses less digits than its factorization.

811834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405919.

The product of its digits is 768, while the sum is 25.

The square root of 811834 is about 901.0183127995. The cubic root of 811834 is about 93.2872760286.

The spelling of 811834 in words is "eight hundred eleven thousand, eight hundred thirty-four".