687690774 has 12 divisors (see below), whose sum is σ = 1489996716. Its totient is φ = 229230252.

The previous prime is 687690739. The next prime is 687690779. The reversal of 687690774 is 477096786.

687690774 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 687690774.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687690779) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19102504 + ... + 19102539.

It is an arithmetic number, because the mean of its divisors is an integer number (124166393).

Almost surely, 2^687690774 is an apocalyptic number.

687690774 is an abundant number, since it is smaller than the sum of its proper divisors (802305942).

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

687690774 is a wasteful number, since it uses less digits than its factorization.

687690774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38205051 (or 38205048 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 54.

The square root of 687690774 is about 26223.8588693579. The cubic root of 687690774 is about 882.6687124844.

The spelling of 687690774 in words is "six hundred eighty-seven million, six hundred ninety thousand, seven hundred seventy-four".