681039 has 12 divisors (see below), whose sum is σ = 1015872. Its totient is φ = 439200.

The previous prime is 681019. The next prime is 681041. The reversal of 681039 is 930186.

681039 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 681039 - 2⁸ = 680783 is a prime.

It is a super-3 number, since 3×681039³ = 947626512433386957, which contains 333 as substring.

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 681039.

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 11 ways as a sum of consecutive naturals, for example, 942 + ... + 1499.

It is an arithmetic number, because the mean of its divisors is an integer number (84656).

2⁶⁸¹⁰³⁹ is an apocalyptic number.

681039 is a deficient number, since it is larger than the sum of its proper divisors (334833).

681039 is a wasteful number, since it uses less digits than its factorization.

681039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2478 (or 2475 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 681039 is about 825.2508709477. The cubic root of 681039 is about 87.9813579657.

The spelling of 681039 in words is "six hundred eighty-one thousand, thirty-nine".