691234 has 8 divisors (see below), whose sum is σ = 1064988. Its totient is φ = 336240.

The previous prime is 691231. The next prime is 691241. The reversal of 691234 is 432196.

It can be written as a sum of positive squares in 2 ways, for example, as 680625 + 10609 = 825^2 + 103^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 691199 and 691208.

It is not an unprimeable number, because it can be changed into a prime (691231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4597 + ... + 4744.

2⁶⁹¹²³⁴ is an apocalyptic number.

691234 is a deficient number, since it is larger than the sum of its proper divisors (373754).

691234 is a wasteful number, since it uses less digits than its factorization.

691234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9380.

The product of its digits is 1296, while the sum is 25.

The square root of 691234 is about 831.4048352036. The cubic root of 691234 is about 88.4182056782.

The spelling of 691234 in words is "six hundred ninety-one thousand, two hundred thirty-four".