686131754 has 32 divisors (see below), whose sum is σ = 1284857856. Its totient is φ = 266969520.

The previous prime is 686131741. The next prime is 686131763. The reversal of 686131754 is 457131686.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134087 + ... + 139109.

It is an arithmetic number, because the mean of its divisors is an integer number (40151808).

Almost surely, 2^686131754 is an apocalyptic number.

686131754 is a deficient number, since it is larger than the sum of its proper divisors (598726102).

686131754 is a wasteful number, since it uses less digits than its factorization.

686131754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5930.

The product of its digits is 120960, while the sum is 41.

The square root of 686131754 is about 26194.1167822089. The cubic root of 686131754 is about 882.0011937740.

The spelling of 686131754 in words is "six hundred eighty-six million, one hundred thirty-one thousand, seven hundred fifty-four".