681339 has 4 divisors (see below), whose sum is σ = 908456. Its totient is φ = 454224.

The previous prime is 681337. The next prime is 681341. The reversal of 681339 is 933186.

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

It is an interprime number because it is at equal distance from previous prime (681337) and next prime (681341).

It is not a de Polignac number, because 681339 - 2¹ = 681337 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681337) 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, 113554 + ... + 113559.

It is an arithmetic number, because the mean of its divisors is an integer number (227114).

2⁶⁸¹³³⁹ is an apocalyptic number.

681339 is a deficient number, since it is larger than the sum of its proper divisors (227117).

681339 is a wasteful number, since it uses less digits than its factorization.

681339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227116.

The product of its digits is 3888, while the sum is 30.

The square root of 681339 is about 825.4326138456. The cubic root of 681339 is about 87.9942747653.

The spelling of 681339 in words is "six hundred eighty-one thousand, three hundred thirty-nine".