688238099 has 16 divisors (see below), whose sum is σ = 720234240. Its totient is φ = 656916480.

The previous prime is 688238077. The next prime is 688238101. The reversal of 688238099 is 990832886.

It is a cyclic number.

It is not a de Polignac number, because 688238099 - 2²⁰ = 687189523 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 688238099.

It is not an unprimeable number, because it can be changed into a prime (688238029) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1192499 + ... + 1193075.

It is an arithmetic number, because the mean of its divisors is an integer number (45014640).

Almost surely, 2^688238099 is an apocalyptic number.

688238099 is a deficient number, since it is larger than the sum of its proper divisors (31996141).

688238099 is a wasteful number, since it uses less digits than its factorization.

688238099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070.

The product of its (nonzero) digits is 1492992, while the sum is 53.

The square root of 688238099 is about 26234.2924242298. The cubic root of 688238099 is about 882.9028189374.

The spelling of 688238099 in words is "six hundred eighty-eight million, two hundred thirty-eight thousand, ninety-nine".