688871085 has 16 divisors (see below), whose sum is σ = 1259650176. Its totient is φ = 314912448.

The previous prime is 688871063. The next prime is 688871101. The reversal of 688871085 is 580178886.

It is a happy number.

It is not a de Polignac number, because 688871085 - 2⁶ = 688871021 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3280234 + ... + 3280443.

It is an arithmetic number, because the mean of its divisors is an integer number (78728136).

Almost surely, 2^688871085 is an apocalyptic number.

It is an amenable number.

688871085 is a deficient number, since it is larger than the sum of its proper divisors (570779091).

688871085 is a wasteful number, since it uses less digits than its factorization.

688871085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6560692.

The product of its (nonzero) digits is 860160, while the sum is 51.

The square root of 688871085 is about 26246.3537467588. The cubic root of 688871085 is about 883.1734103112.

The spelling of 688871085 in words is "six hundred eighty-eight million, eight hundred seventy-one thousand, eighty-five".