688203899 has 2 divisors, whose sum is σ = 688203900. Its totient is φ = 688203898.

The previous prime is 688203869. The next prime is 688203917. The reversal of 688203899 is 998302886.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 688203899 - 2⁸ = 688203643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 688203899.

It is not a weakly prime, because it can be changed into another prime (688203829) 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 as a sum of consecutive naturals, namely, 344101949 + 344101950.

It is an arithmetic number, because the mean of its divisors is an integer number (344101950).

Almost surely, 2^688203899 is an apocalyptic number.

688203899 is a deficient number, since it is larger than the sum of its proper divisors (1).

688203899 is an equidigital number, since it uses as much as digits as its factorization.

688203899 is an odious number, because the sum of its binary digits is odd.

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

The square root of 688203899 is about 26233.6405975229. The cubic root of 688203899 is about 882.8881942619. Note that the first 3 decimals are identical.

The spelling of 688203899 in words is "six hundred eighty-eight million, two hundred three thousand, eight hundred ninety-nine".