688278097 has 8 divisors (see below), whose sum is σ = 780234560. Its totient is φ = 601894800.

The previous prime is 688278077. The next prime is 688278121. The reversal of 688278097 is 790872886.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 688278097 - 2¹⁵ = 688245329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (688278037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1393029 + ... + 1393522.

It is an arithmetic number, because the mean of its divisors is an integer number (97529320).

Almost surely, 2^688278097 is an apocalyptic number.

It is an amenable number.

688278097 is a deficient number, since it is larger than the sum of its proper divisors (91956463).

688278097 is a wasteful number, since it uses less digits than its factorization.

688278097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2786583.

The product of its (nonzero) digits is 2709504, while the sum is 55.

The square root of 688278097 is about 26235.0547359825. The cubic root of 688278097 is about 882.9199223511.

The spelling of 688278097 in words is "six hundred eighty-eight million, two hundred seventy-eight thousand, ninety-seven".