686439323 has 4 divisors (see below), whose sum is σ = 686641008. Its totient is φ = 686237640.

The previous prime is 686439319. The next prime is 686439373. The reversal of 686439323 is 323934686.

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 686439323 - 2² = 686439319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (686439373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95648 + ... + 102573.

It is an arithmetic number, because the mean of its divisors is an integer number (171660252).

Almost surely, 2^686439323 is an apocalyptic number.

686439323 is a deficient number, since it is larger than the sum of its proper divisors (201685).

686439323 is a wasteful number, since it uses less digits than its factorization.

686439323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201684.

The product of its digits is 559872, while the sum is 44.

The square root of 686439323 is about 26199.9870801495. The cubic root of 686439323 is about 882.1329642389.

The spelling of 686439323 in words is "six hundred eighty-six million, four hundred thirty-nine thousand, three hundred twenty-three".