686477605 has 16 divisors (see below), whose sum is σ = 900361728. Its totient is φ = 498312000.

The previous prime is 686477569. The next prime is 686477621. The reversal of 686477605 is 506774686.

It is not a de Polignac number, because 686477605 - 2²⁹ = 149606693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18220 + ... + 41290.

It is an arithmetic number, because the mean of its divisors is an integer number (56272608).

Almost surely, 2^686477605 is an apocalyptic number.

It is an amenable number.

686477605 is a deficient number, since it is larger than the sum of its proper divisors (213884123).

686477605 is a wasteful number, since it uses less digits than its factorization.

686477605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23628.

The product of its (nonzero) digits is 1693440, while the sum is 49.

The square root of 686477605 is about 26200.7176428433. The cubic root of 686477605 is about 882.1493624770.

The spelling of 686477605 in words is "six hundred eighty-six million, four hundred seventy-seven thousand, six hundred five".