681353 has 4 divisors (see below), whose sum is σ = 683280. Its totient is φ = 679428.

The previous prime is 681341. The next prime is 681361. The reversal of 681353 is 353186.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 681353 - 2⁴ = 681337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (681253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263 + ... + 1196.

It is an arithmetic number, because the mean of its divisors is an integer number (170820).

2⁶⁸¹³⁵³ is an apocalyptic number.

It is an amenable number.

681353 is a deficient number, since it is larger than the sum of its proper divisors (1927).

681353 is a wasteful number, since it uses less digits than its factorization.

681353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1926.

The product of its digits is 2160, while the sum is 26.

The square root of 681353 is about 825.4410942036. The cubic root of 681353 is about 87.9948774566.

The spelling of 681353 in words is "six hundred eighty-one thousand, three hundred fifty-three".