687772122 has 8 divisors (see below), whose sum is σ = 1375544256. Its totient is φ = 229257372.

The previous prime is 687772117. The next prime is 687772177. The reversal of 687772122 is 221277786.

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

687772122 is an admirable number.

It is an unprimeable number.

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, 57314338 + ... + 57314349.

It is an arithmetic number, because the mean of its divisors is an integer number (171943032).

Almost surely, 2^687772122 is an apocalyptic number.

687772122 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

687772122 is a wasteful number, since it uses less digits than its factorization.

687772122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114628692.

The product of its digits is 131712, while the sum is 42.

The square root of 687772122 is about 26225.4098538040. The cubic root of 687772122 is about 882.7035151923.

The spelling of 687772122 in words is "six hundred eighty-seven million, seven hundred seventy-two thousand, one hundred twenty-two".