681934 has 16 divisors (see below), whose sum is σ = 1128960. Its totient is φ = 306360.

The previous prime is 681931. The next prime is 681943. The reversal of 681934 is 439186.

It is a junction number, because it is equal to n+sod(n) for n = 681896 and 681905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2947 + ... + 3169.

It is an arithmetic number, because the mean of its divisors is an integer number (70560).

2⁶⁸¹⁹³⁴ is an apocalyptic number.

681934 is a deficient number, since it is larger than the sum of its proper divisors (447026).

681934 is a wasteful number, since it uses less digits than its factorization.

681934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375.

The product of its digits is 5184, while the sum is 31.

The square root of 681934 is about 825.7929522586. The cubic root of 681934 is about 88.0198818714.

It can be divided in two parts, 68 and 1934, that added together give a palindrome (2002).

The spelling of 681934 in words is "six hundred eighty-one thousand, nine hundred thirty-four".