688428095 has 4 divisors (see below), whose sum is σ = 826113720. Its totient is φ = 550742472.

The previous prime is 688428043. The next prime is 688428113. The reversal of 688428095 is 590824886.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 590824886 = 2 ⋅295412443.

It is a cyclic number.

It is not a de Polignac number, because 688428095 - 2¹² = 688423999 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68842805 + ... + 68842814.

It is an arithmetic number, because the mean of its divisors is an integer number (206528430).

Almost surely, 2^688428095 is an apocalyptic number.

688428095 is a deficient number, since it is larger than the sum of its proper divisors (137685625).

688428095 is a wasteful number, since it uses less digits than its factorization.

688428095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137685624.

The product of its (nonzero) digits is 1105920, while the sum is 50.

The square root of 688428095 is about 26237.9133126093. The cubic root of 688428095 is about 882.9840566032.

The spelling of 688428095 in words is "six hundred eighty-eight million, four hundred twenty-eight thousand, ninety-five".