688716507 has 8 divisors (see below), whose sum is σ = 918889984. Its totient is φ = 458843688.

The previous prime is 688716493. The next prime is 688716533. The reversal of 688716507 is 705617886.

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

It is not a de Polignac number, because 688716507 - 2¹⁰ = 688715483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (688716547) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 69763 + ... + 79020.

It is an arithmetic number, because the mean of its divisors is an integer number (114861248).

Almost surely, 2^688716507 is an apocalyptic number.

688716507 is a deficient number, since it is larger than the sum of its proper divisors (230173477).

688716507 is a wasteful number, since it uses less digits than its factorization.

688716507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150329.

The product of its (nonzero) digits is 564480, while the sum is 48.

The square root of 688716507 is about 26243.4088296471. The cubic root of 688716507 is about 883.1073459948.

The spelling of 688716507 in words is "six hundred eighty-eight million, seven hundred sixteen thousand, five hundred seven".