686721482 has 4 divisors (see below), whose sum is σ = 1030082226. Its totient is φ = 343360740.

The previous prime is 686721467. The next prime is 686721487. The reversal of 686721482 is 284127686.

686721482 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 644093641 + 42627841 = 25379^2 + 6529^2 .

It is not an unprimeable number, because it can be changed into a prime (686721487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171680369 + ... + 171680372.

Almost surely, 2^686721482 is an apocalyptic number.

686721482 is a deficient number, since it is larger than the sum of its proper divisors (343360744).

686721482 is a wasteful number, since it uses less digits than its factorization.

686721482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343360743.

The product of its digits is 258048, while the sum is 44.

The square root of 686721482 is about 26205.3712433157. The cubic root of 686721482 is about 882.2538137935.

The spelling of 686721482 in words is "six hundred eighty-six million, seven hundred twenty-one thousand, four hundred eighty-two".