686873427 has 16 divisors (see below), whose sum is σ = 973585920. Its totient is φ = 429516000.

The previous prime is 686873371. The next prime is 686873441. The reversal of 686873427 is 724378686.

It is not a de Polignac number, because 686873427 - 2²⁰ = 685824851 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 686873427.

It is not an unprimeable number, because it can be changed into a prime (686873027) 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, 53899 + ... + 65412.

It is an arithmetic number, because the mean of its divisors is an integer number (60849120).

Almost surely, 2^686873427 is an apocalyptic number.

686873427 is a deficient number, since it is larger than the sum of its proper divisors (286712493).

686873427 is a wasteful number, since it uses less digits than its factorization.

686873427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119434.

The product of its digits is 2709504, while the sum is 51.

The square root of 686873427 is about 26208.2702023617. The cubic root of 686873427 is about 882.3188785849.

The spelling of 686873427 in words is "six hundred eighty-six million, eight hundred seventy-three thousand, four hundred twenty-seven".