688000243 has 16 divisors (see below), whose sum is σ = 793483776. Its totient is φ = 584337600.

The previous prime is 688000231. The next prime is 688000249. The reversal of 688000243 is 342000886.

It is a happy number.

It is not a de Polignac number, because 688000243 - 2²¹ = 685903091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (688000249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 721455 + ... + 722407.

It is an arithmetic number, because the mean of its divisors is an integer number (49592736).

Almost surely, 2^688000243 is an apocalyptic number.

688000243 is a deficient number, since it is larger than the sum of its proper divisors (105483533).

688000243 is a wasteful number, since it uses less digits than its factorization.

688000243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1794.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 688000243 is about 26229.7587293517. The cubic root of 688000243 is about 882.8010964228.

The spelling of 688000243 in words is "six hundred eighty-eight million, two hundred forty-three", and thus it is an aban number.