681383 has 4 divisors (see below), whose sum is σ = 683088. Its totient is φ = 679680.

The previous prime is 681371. The next prime is 681403. The reversal of 681383 is 383186.

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

It is a cyclic number.

It is not a de Polignac number, because 681383 - 2⁴ = 681367 is a prime.

It is a Duffinian number.

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 681383.

It is not an unprimeable number, because it can be changed into a prime (681883) 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 3 ways as a sum of consecutive naturals, for example, 110 + ... + 1172.

It is an arithmetic number, because the mean of its divisors is an integer number (170772).

2⁶⁸¹³⁸³ is an apocalyptic number.

681383 is a deficient number, since it is larger than the sum of its proper divisors (1705).

681383 is a wasteful number, since it uses less digits than its factorization.

681383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1704.

The product of its digits is 3456, while the sum is 29.

The square root of 681383 is about 825.4592661058. The cubic root of 681383 is about 87.9961689104.

The spelling of 681383 in words is "six hundred eighty-one thousand, three hundred eighty-three".