687568763 has 8 divisors (see below), whose sum is σ = 795260928. Its totient is φ = 582243624.

The previous prime is 687568741. The next prime is 687568769. The reversal of 687568763 is 367865786.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 687568763 - 2⁸ = 687568507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 687568699 and 687568708.

It is not an unprimeable number, because it can be changed into a prime (687568769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 591131 + ... + 592292.

It is an arithmetic number, because the mean of its divisors is an integer number (99407616).

Almost surely, 2^687568763 is an apocalyptic number.

687568763 is a deficient number, since it is larger than the sum of its proper divisors (107692165).

687568763 is a wasteful number, since it uses less digits than its factorization.

687568763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183513.

The product of its digits is 10160640, while the sum is 56.

The square root of 687568763 is about 26221.5324304282. The cubic root of 687568763 is about 882.6165079830.

The spelling of 687568763 in words is "six hundred eighty-seven million, five hundred sixty-eight thousand, seven hundred sixty-three".