681829 has 8 divisors (see below), whose sum is σ = 708480. Its totient is φ = 655776.

The previous prime is 681823. The next prime is 681833. The reversal of 681829 is 928186.

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

It is a cyclic number.

It is not a de Polignac number, because 681829 - 2¹¹ = 679781 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 681794 and 681803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681823) 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 7 ways as a sum of consecutive naturals, for example, 4102 + ... + 4264.

It is an arithmetic number, because the mean of its divisors is an integer number (88560).

2⁶⁸¹⁸²⁹ is an apocalyptic number.

It is an amenable number.

681829 is a deficient number, since it is larger than the sum of its proper divisors (26651).

681829 is a wasteful number, since it uses less digits than its factorization.

681829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299.

The product of its digits is 6912, while the sum is 34.

The square root of 681829 is about 825.7293745532. The cubic root of 681829 is about 88.0153640529.

The spelling of 681829 in words is "six hundred eighty-one thousand, eight hundred twenty-nine".