686989794 has 8 divisors (see below), whose sum is σ = 1373979600. Its totient is φ = 228996596.

The previous prime is 686989789. The next prime is 686989817. The reversal of 686989794 is 497989686.

It is a sphenic number, since it is the product of 3 distinct primes.

686989794 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57249144 + ... + 57249155.

It is an arithmetic number, because the mean of its divisors is an integer number (171747450).

Almost surely, 2^686989794 is an apocalyptic number.

686989794 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

686989794 is a wasteful number, since it uses less digits than its factorization.

686989794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114498304.

The product of its digits is 47029248, while the sum is 66.

The square root of 686989794 is about 26210.4901518457. The cubic root of 686989794 is about 882.3687019339.

The spelling of 686989794 in words is "six hundred eighty-six million, nine hundred eighty-nine thousand, seven hundred ninety-four".