688814213 has 8 divisors (see below), whose sum is σ = 695476608. Its totient is φ = 682161984.

The previous prime is 688814209. The next prime is 688814221. The reversal of 688814213 is 312418886.

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 688814213 - 2² = 688814209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688814813) 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, 247556 + ... + 250322.

It is an arithmetic number, because the mean of its divisors is an integer number (86934576).

Almost surely, 2^688814213 is an apocalyptic number.

It is an amenable number.

688814213 is a deficient number, since it is larger than the sum of its proper divisors (6662395).

688814213 is a wasteful number, since it uses less digits than its factorization.

688814213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5083.

The product of its digits is 73728, while the sum is 41.

The square root of 688814213 is about 26245.2702977127. The cubic root of 688814213 is about 883.1491052215.

The spelling of 688814213 in words is "six hundred eighty-eight million, eight hundred fourteen thousand, two hundred thirteen".