811934 has 4 divisors (see below), whose sum is σ = 1217904. Its totient is φ = 405966.

The previous prime is 811933. The next prime is 811957. The reversal of 811934 is 439118.

It is a semiprime because it is the product of two primes.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811931) 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 as a sum of consecutive naturals, namely, 202982 + ... + 202985.

It is an arithmetic number, because the mean of its divisors is an integer number (304476).

2⁸¹¹⁹³⁴ is an apocalyptic number.

811934 is a deficient number, since it is larger than the sum of its proper divisors (405970).

811934 is a wasteful number, since it uses less digits than its factorization.

811934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405969.

The product of its digits is 864, while the sum is 26.

The square root of 811934 is about 901.0738038585. The cubic root of 811934 is about 93.2911061813.

Subtracting from 811934 its reverse (439118), we obtain a triangular number (372816 = T₈₆₃).

The spelling of 811934 in words is "eight hundred eleven thousand, nine hundred thirty-four".