686344875 has 16 divisors (see below), whose sum is σ = 1142078496. Its totient is φ = 366050400.

The previous prime is 686344873. The next prime is 686344877. The reversal of 686344875 is 578443686.

686344875 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (686344873) and next prime (686344877).

It is not a de Polignac number, because 686344875 - 2¹ = 686344873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (686344871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 914752 + ... + 915501.

It is an arithmetic number, because the mean of its divisors is an integer number (71379906).

Almost surely, 2^686344875 is an apocalyptic number.

686344875 is a deficient number, since it is larger than the sum of its proper divisors (455733621).

686344875 is a wasteful number, since it uses less digits than its factorization.

686344875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830271 (or 1830261 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 51.

The square root of 686344875 is about 26198.1845745082. The cubic root of 686344875 is about 882.0925044765.

The spelling of 686344875 in words is "six hundred eighty-six million, three hundred forty-four thousand, eight hundred seventy-five".