688361599 has 2 divisors, whose sum is σ = 688361600. Its totient is φ = 688361598.

The previous prime is 688361593. The next prime is 688361623. The reversal of 688361599 is 995163886.

It is a happy number.

688361599 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 688361599 - 2³ = 688361591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688361591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344180799 + 344180800.

It is an arithmetic number, because the mean of its divisors is an integer number (344180800).

Almost surely, 2^688361599 is an apocalyptic number.

688361599 is a deficient number, since it is larger than the sum of its proper divisors (1).

688361599 is an equidigital number, since it uses as much as digits as its factorization.

688361599 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 55.

The square root of 688361599 is about 26236.6461080680. The cubic root of 688361599 is about 882.9556262322.

The spelling of 688361599 in words is "six hundred eighty-eight million, three hundred sixty-one thousand, five hundred ninety-nine".