686682039 has 8 divisors (see below), whose sum is σ = 947147760. Its totient is φ = 442002176.

The previous prime is 686681993. The next prime is 686682077. The reversal of 686682039 is 930286686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 686682039 - 2⁷ = 686681911 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686682239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3946362 + ... + 3946535.

It is an arithmetic number, because the mean of its divisors is an integer number (118393470).

Almost surely, 2^686682039 is an apocalyptic number.

686682039 is a deficient number, since it is larger than the sum of its proper divisors (260465721).

686682039 is a wasteful number, since it uses less digits than its factorization.

686682039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7892929.

The product of its (nonzero) digits is 746496, while the sum is 48.

The square root of 686682039 is about 26204.6186577863. The cubic root of 686682039 is about 882.2369222276.

It can be divided in two parts, 68668 and 2039, that added together give a palindrome (70707).

The spelling of 686682039 in words is "six hundred eighty-six million, six hundred eighty-two thousand, thirty-nine".