687563742 has 32 divisors (see below), whose sum is σ = 1471048992. Its totient is φ = 213479424.

The previous prime is 687563741. The next prime is 687563819. The reversal of 687563742 is 247365786.

It is a junction number, because it is equal to n+sod(n) for n = 687563691 and 687563700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687563741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24853 + ... + 44640.

It is an arithmetic number, because the mean of its divisors is an integer number (45970281).

Almost surely, 2^687563742 is an apocalyptic number.

687563742 is an abundant number, since it is smaller than the sum of its proper divisors (783485250).

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

687563742 is a wasteful number, since it uses less digits than its factorization.

687563742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69612.

The product of its digits is 1693440, while the sum is 48.

The square root of 687563742 is about 26221.4366883281. The cubic root of 687563742 is about 882.6143595296.

The spelling of 687563742 in words is "six hundred eighty-seven million, five hundred sixty-three thousand, seven hundred forty-two".