686074 has 4 divisors (see below), whose sum is σ = 1029114. Its totient is φ = 343036.

The previous prime is 686057. The next prime is 686087. The reversal of 686074 is 470686.

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., 429025 + 257049 = 655^2 + 507^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171517 + ... + 171520.

2⁶⁸⁶⁰⁷⁴ is an apocalyptic number.

686074 is a deficient number, since it is larger than the sum of its proper divisors (343040).

686074 is a wasteful number, since it uses less digits than its factorization.

686074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343039.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 686074 is about 828.2958408685. The cubic root of 686074 is about 88.1976446085.

The spelling of 686074 in words is "six hundred eighty-six thousand, seventy-four".