691834 has 32 divisors (see below), whose sum is σ = 1270080. Its totient is φ = 278400.

The previous prime is 691829. The next prime is 691837. The reversal of 691834 is 438196.

It is a junction number, because it is equal to n+sod(n) for n = 691796 and 691805.

It is not an unprimeable number, because it can be changed into a prime (691837) 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 15 ways as a sum of consecutive naturals, for example, 11697 + ... + 11755.

It is an arithmetic number, because the mean of its divisors is an integer number (39690).

2⁶⁹¹⁸³⁴ is an apocalyptic number.

691834 is a deficient number, since it is larger than the sum of its proper divisors (578246).

691834 is a wasteful number, since it uses less digits than its factorization.

691834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126.

The product of its digits is 5184, while the sum is 31.

The square root of 691834 is about 831.7655919789. The cubic root of 691834 is about 88.4437809929.

The spelling of 691834 in words is "six hundred ninety-one thousand, eight hundred thirty-four".