682909 has 4 divisors (see below), whose sum is σ = 701404. Its totient is φ = 664416.

The previous prime is 682901. The next prime is 682933. The reversal of 682909 is 909286.

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

It can be written as a sum of positive squares in 2 ways, for example, as 562500 + 120409 = 750^2 + 347^2 .

It is a cyclic number.

It is not a de Polignac number, because 682909 - 2³ = 682901 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (682901) 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, 9192 + ... + 9265.

It is an arithmetic number, because the mean of its divisors is an integer number (175351).

2⁶⁸²⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

682909 is a deficient number, since it is larger than the sum of its proper divisors (18495).

682909 is a wasteful number, since it uses less digits than its factorization.

682909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18494.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 682909 is about 826.3830830795. The cubic root of 682909 is about 88.0618109129.

The spelling of 682909 in words is "six hundred eighty-two thousand, nine hundred nine".