686834673 has 16 divisors (see below), whose sum is σ = 1047653376. Its totient is φ = 392083920.

The previous prime is 686834653. The next prime is 686834677. The reversal of 686834673 is 376438686.

It is a happy number.

It is not a de Polignac number, because 686834673 - 2⁸ = 686834417 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (686834677) 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, 5790 + ... + 37512.

It is an arithmetic number, because the mean of its divisors is an integer number (65478336).

Almost surely, 2^686834673 is an apocalyptic number.

It is an amenable number.

686834673 is a deficient number, since it is larger than the sum of its proper divisors (360818703).

686834673 is a wasteful number, since it uses less digits than its factorization.

686834673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32764.

The product of its digits is 3483648, while the sum is 51.

The square root of 686834673 is about 26207.5308451598. The cubic root of 686834673 is about 882.3022845384.

The spelling of 686834673 in words is "six hundred eighty-six million, eight hundred thirty-four thousand, six hundred seventy-three".