688289047 has 12 divisors (see below), whose sum is σ = 743163496. Its totient is φ = 637165440.

The previous prime is 688289033. The next prime is 688289083. The reversal of 688289047 is 740982886.

It is not a de Polignac number, because 688289047 - 2¹¹ = 688286999 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 688288985 and 688289003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688289027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1893 + ... + 37150.

Almost surely, 2^688289047 is an apocalyptic number.

688289047 is a deficient number, since it is larger than the sum of its proper divisors (54874449).

688289047 is a wasteful number, since it uses less digits than its factorization.

688289047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39138 (or 39121 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 52.

The square root of 688289047 is about 26235.2634253975. The cubic root of 688289047 is about 882.9246045292.

The spelling of 688289047 in words is "six hundred eighty-eight million, two hundred eighty-nine thousand, forty-seven".