681376 has 24 divisors (see below), whose sum is σ = 1360800. Its totient is φ = 335808.

The previous prime is 681371. The next prime is 681403. The reversal of 681376 is 673186.

It is not an unprimeable number, because it can be changed into a prime (681371) by changing a digit.

681376 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3325 + ... + 3523.

It is an arithmetic number, because the mean of its divisors is an integer number (56700).

2⁶⁸¹³⁷⁶ is an apocalyptic number.

It is an amenable number.

681376 is a deficient number, since it is larger than the sum of its proper divisors (679424).

681376 is a wasteful number, since it uses less digits than its factorization.

681376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 308 counting only the distinct ones).

The product of its digits is 6048, while the sum is 31.

The square root of 681376 is about 825.4550260311. The cubic root of 681376 is about 87.9958675745.

It can be divided in two parts, 6813 and 76, that added together give a square (6889 = 83²).

The spelling of 681376 in words is "six hundred eighty-one thousand, three hundred seventy-six".