688563811 has 8 divisors (see below), whose sum is σ = 773771040. Its totient is φ = 607962432.

The previous prime is 688563809. The next prime is 688563817. The reversal of 688563811 is 118365886.

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 688563811 - 2¹ = 688563809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (688563817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1151146 + ... + 1151743.

It is an arithmetic number, because the mean of its divisors is an integer number (96721380).

Almost surely, 2^688563811 is an apocalyptic number.

688563811 is a deficient number, since it is larger than the sum of its proper divisors (85207229).

688563811 is a wasteful number, since it uses less digits than its factorization.

688563811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2302925.

The product of its digits is 276480, while the sum is 46.

The square root of 688563811 is about 26240.4994426554. The cubic root of 688563811 is about 883.0420763108.

The spelling of 688563811 in words is "six hundred eighty-eight million, five hundred sixty-three thousand, eight hundred eleven".