686625317 has 8 divisors (see below), whose sum is σ = 805923456. Its totient is φ = 572629392.

The previous prime is 686625307. The next prime is 686625323. The reversal of 686625317 is 713526686.

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 686625317 - 2⁶ = 686625253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686625307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1325273 + ... + 1325790.

It is an arithmetic number, because the mean of its divisors is an integer number (100740432).

Almost surely, 2^686625317 is an apocalyptic number.

It is an amenable number.

686625317 is a deficient number, since it is larger than the sum of its proper divisors (119298139).

686625317 is a wasteful number, since it uses less digits than its factorization.

686625317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2651107.

The product of its digits is 362880, while the sum is 44.

The square root of 686625317 is about 26203.5363453103. The cubic root of 686625317 is about 882.2126297517.

The spelling of 686625317 in words is "six hundred eighty-six million, six hundred twenty-five thousand, three hundred seventeen".