688969013 has 8 divisors (see below), whose sum is σ = 767891520. Its totient is φ = 614312640.

The previous prime is 688969003. The next prime is 688969097. The reversal of 688969013 is 310969886.

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 688969013 - 2¹⁶ = 688903477 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 (688969003) 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, 1066193 + ... + 1066838.

It is an arithmetic number, because the mean of its divisors is an integer number (95986440).

Almost surely, 2^688969013 is an apocalyptic number.

It is an amenable number.

688969013 is a deficient number, since it is larger than the sum of its proper divisors (78922507).

688969013 is a wasteful number, since it uses less digits than its factorization.

688969013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2133067.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 688969013 is about 26248.2192348357. The cubic root of 688969013 is about 883.2152581545.

The spelling of 688969013 in words is "six hundred eighty-eight million, nine hundred sixty-nine thousand, thirteen".