687604122 has 12 divisors (see below), whose sum is σ = 1489808970. Its totient is φ = 229201368.

The previous prime is 687604097. The next prime is 687604163. The reversal of 687604122 is 221406786.

It can be written as a sum of positive squares in only one way, i.e., 542377521 + 145226601 = 23289^2 + 12051^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19100097 + ... + 19100132.

Almost surely, 2^687604122 is an apocalyptic number.

687604122 is an abundant number, since it is smaller than the sum of its proper divisors (802204848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

687604122 is a wasteful number, since it uses less digits than its factorization.

687604122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38200237 (or 38200234 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 687604122 is about 26222.2066577167. The cubic root of 687604122 is about 882.6316375738.

The spelling of 687604122 in words is "six hundred eighty-seven million, six hundred four thousand, one hundred twenty-two".