686324919 has 12 divisors (see below), whose sum is σ = 1064504184. Its totient is φ = 392185584.

The previous prime is 686324917. The next prime is 686324921. The reversal of 686324919 is 919423686.

It is an interprime number because it is at equal distance from previous prime (686324917) and next prime (686324921).

It is not a de Polignac number, because 686324919 - 2¹ = 686324917 is a prime.

It is a super-2 number, since 2×686324919² = 942083788880713122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686324917) 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 11 ways as a sum of consecutive naturals, for example, 2334292 + ... + 2334585.

It is an arithmetic number, because the mean of its divisors is an integer number (88708682).

Almost surely, 2^686324919 is an apocalyptic number.

686324919 is a deficient number, since it is larger than the sum of its proper divisors (378179265).

686324919 is a wasteful number, since it uses less digits than its factorization.

686324919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4668894 (or 4668887 counting only the distinct ones).

The product of its digits is 559872, while the sum is 48.

The square root of 686324919 is about 26197.8037056544. The cubic root of 686324919 is about 882.0839552232.

The spelling of 686324919 in words is "six hundred eighty-six million, three hundred twenty-four thousand, nine hundred nineteen".