686285723 has 4 divisors (see below), whose sum is σ = 686338128. Its totient is φ = 686233320.

The previous prime is 686285701. The next prime is 686285741. The reversal of 686285723 is 327582686.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 686285723 - 2⁶ = 686285659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (686285323) 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, 12338 + ... + 39048.

It is an arithmetic number, because the mean of its divisors is an integer number (171584532).

Almost surely, 2^686285723 is an apocalyptic number.

686285723 is a deficient number, since it is larger than the sum of its proper divisors (52405).

686285723 is a wasteful number, since it uses less digits than its factorization.

686285723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52404.

The product of its digits is 967680, while the sum is 47.

The square root of 686285723 is about 26197.0556169963. The cubic root of 686285723 is about 882.0671629722.

The spelling of 686285723 in words is "six hundred eighty-six million, two hundred eighty-five thousand, seven hundred twenty-three".