686504471 has 4 divisors (see below), whose sum is σ = 698140200. Its totient is φ = 674868744.

The previous prime is 686504449. The next prime is 686504491. The reversal of 686504471 is 174405686.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 686504471 - 2⁶ = 686504407 is a prime.

It is a super-3 number, since 3×686504471³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686504411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5817776 + ... + 5817893.

It is an arithmetic number, because the mean of its divisors is an integer number (174535050).

Almost surely, 2^686504471 is an apocalyptic number.

686504471 is a deficient number, since it is larger than the sum of its proper divisors (11635729).

686504471 is a wasteful number, since it uses less digits than its factorization.

686504471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11635728.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 686504471 is about 26201.2303337076. The cubic root of 686504471 is about 882.1608702647.

The spelling of 686504471 in words is "six hundred eighty-six million, five hundred four thousand, four hundred seventy-one".