681029 has 4 divisors (see below), whose sum is σ = 684684. Its totient is φ = 677376.

The previous prime is 681019. The next prime is 681041. The reversal of 681029 is 920186.

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

It can be written as a sum of positive squares in 2 ways, for example, as 332929 + 348100 = 577^2 + 590^2 .

It is a cyclic number.

It is not a de Polignac number, because 681029 - 2¹⁶ = 615493 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 680989 and 681007.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 681029.

It is not an unprimeable number, because it can be changed into a prime (681019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1532 + ... + 1925.

It is an arithmetic number, because the mean of its divisors is an integer number (171171).

2⁶⁸¹⁰²⁹ is an apocalyptic number.

It is an amenable number.

681029 is a deficient number, since it is larger than the sum of its proper divisors (3655).

681029 is a wasteful number, since it uses less digits than its factorization.

681029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3654.

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

The square root of 681029 is about 825.2448121618. The cubic root of 681029 is about 87.9809273404.

The spelling of 681029 in words is "six hundred eighty-one thousand, twenty-nine".