681079 has 8 divisors (see below), whose sum is σ = 784800. Its totient is φ = 578976.

The previous prime is 681067. The next prime is 681089. The reversal of 681079 is 970186.

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 681079 - 2⁵ = 681047 is a prime.

It is a Duffinian number.

681079 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 681079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681019) 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, 717 + ... + 1369.

It is an arithmetic number, because the mean of its divisors is an integer number (98100).

2⁶⁸¹⁰⁷⁹ is an apocalyptic number.

681079 is a deficient number, since it is larger than the sum of its proper divisors (103721).

681079 is a wasteful number, since it uses less digits than its factorization.

681079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 681079 is about 825.2751056466. The cubic root of 681079 is about 87.9830804248.

It can be divided in two parts, 6810 and 79, that added together give a square (6889 = 83²).

The spelling of 681079 in words is "six hundred eighty-one thousand, seventy-nine".