688674927 has 4 divisors (see below), whose sum is σ = 918233240. Its totient is φ = 459116616.

The previous prime is 688674923. The next prime is 688674983. The reversal of 688674927 is 729476886.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 688674927 - 2² = 688674923 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 (688674923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114779152 + ... + 114779157.

It is an arithmetic number, because the mean of its divisors is an integer number (229558310).

Almost surely, 2^688674927 is an apocalyptic number.

688674927 is a deficient number, since it is larger than the sum of its proper divisors (229558313).

688674927 is a wasteful number, since it uses less digits than its factorization.

688674927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229558312.

The product of its digits is 8128512, while the sum is 57.

The square root of 688674927 is about 26242.6166187749. The cubic root of 688674927 is about 883.0895736399.

The spelling of 688674927 in words is "six hundred eighty-eight million, six hundred seventy-four thousand, nine hundred twenty-seven".