686116474 has 4 divisors (see below), whose sum is σ = 1029174714. Its totient is φ = 343058236.

The previous prime is 686116469. The next prime is 686116489. The reversal of 686116474 is 474611686.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 666001249 + 20115225 = 25807^2 + 4485^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 686116474.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171529117 + ... + 171529120.

Almost surely, 2^686116474 is an apocalyptic number.

686116474 is a deficient number, since it is larger than the sum of its proper divisors (343058240).

686116474 is a wasteful number, since it uses less digits than its factorization.

686116474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343058239.

The product of its digits is 193536, while the sum is 43.

The square root of 686116474 is about 26193.8251120374. The cubic root of 686116474 is about 881.9946464025.

The spelling of 686116474 in words is "six hundred eighty-six million, one hundred sixteen thousand, four hundred seventy-four".