686550122 has 8 divisors (see below), whose sum is σ = 1035053316. Its totient is φ = 341532352.

The previous prime is 686550121. The next prime is 686550143. The reversal of 686550122 is 221055686.

It can be written as a sum of positive squares in 2 ways, for example, as 566011681 + 120538441 = 23791^2 + 10979^2 .

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

It is not an unprimeable number, because it can be changed into a prime (686550121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 870863 + ... + 871650.

Almost surely, 2^686550122 is an apocalyptic number.

686550122 is a deficient number, since it is larger than the sum of its proper divisors (348503194).

686550122 is a wasteful number, since it uses less digits than its factorization.

686550122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1742712.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 686550122 is about 26202.1014806065. The cubic root of 686550122 is about 882.1804237345.

The spelling of 686550122 in words is "six hundred eighty-six million, five hundred fifty thousand, one hundred twenty-two".