687966042 has 8 divisors (see below), whose sum is σ = 1375932096. Its totient is φ = 229322012.

The previous prime is 687966029. The next prime is 687966061. The reversal of 687966042 is 240669786.

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

687966042 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 687965982 and 687966000.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57330498 + ... + 57330509.

It is an arithmetic number, because the mean of its divisors is an integer number (171991512).

Almost surely, 2^687966042 is an apocalyptic number.

687966042 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.

687966042 is a wasteful number, since it uses less digits than its factorization.

687966042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114661012.

The product of its (nonzero) digits is 870912, while the sum is 48.

The square root of 687966042 is about 26229.1067709139. The cubic root of 687966042 is about 882.7864679490.

The spelling of 687966042 in words is "six hundred eighty-seven million, nine hundred sixty-six thousand, forty-two".