688889063 has 2 divisors, whose sum is σ = 688889064. Its totient is φ = 688889062.

The previous prime is 688889057. The next prime is 688889081. The reversal of 688889063 is 360988886.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 688889063 - 2¹² = 688884967 is a prime.

It is a super-2 number, since 2×688889063² = 949136282242035938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688889083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344444531 + 344444532.

It is an arithmetic number, because the mean of its divisors is an integer number (344444532).

Almost surely, 2^688889063 is an apocalyptic number.

688889063 is a deficient number, since it is larger than the sum of its proper divisors (1).

688889063 is an equidigital number, since it uses as much as digits as its factorization.

688889063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3981312, while the sum is 56.

The square root of 688889063 is about 26246.6962301925. The cubic root of 688889063 is about 883.1810931969.

The spelling of 688889063 in words is "six hundred eighty-eight million, eight hundred eighty-nine thousand, sixty-three".