686607794 has 8 divisors (see below), whose sum is σ = 1036824300. Its totient is φ = 340999696.

The previous prime is 686607787. The next prime is 686607821. The reversal of 686607794 is 497706686.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 680531569 + 6076225 = 26087^2 + 2465^2 .

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

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, 1151729 + ... + 1152324.

Almost surely, 2^686607794 is an apocalyptic number.

686607794 is a deficient number, since it is larger than the sum of its proper divisors (350216506).

686607794 is a wasteful number, since it uses less digits than its factorization.

686607794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2304204.

The product of its (nonzero) digits is 3048192, while the sum is 53.

The square root of 686607794 is about 26203.2019799108. The cubic root of 686607794 is about 882.2051248613.

The spelling of 686607794 in words is "six hundred eighty-six million, six hundred seven thousand, seven hundred ninety-four".