688019117 has 2 divisors, whose sum is σ = 688019118. Its totient is φ = 688019116.

The previous prime is 688019083. The next prime is 688019131. The reversal of 688019117 is 711910886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 683613316 + 4405801 = 26146^2 + 2099^2 .

It is a cyclic number.

It is not a de Polignac number, because 688019117 - 2¹² = 688015021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (688019147) 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, 344009558 + 344009559.

It is an arithmetic number, because the mean of its divisors is an integer number (344009559).

Almost surely, 2^688019117 is an apocalyptic number.

It is an amenable number.

688019117 is a deficient number, since it is larger than the sum of its proper divisors (1).

688019117 is an equidigital number, since it uses as much as digits as its factorization.

688019117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 41.

The square root of 688019117 is about 26230.1185090727. The cubic root of 688019117 is about 882.8091690147.

The spelling of 688019117 in words is "six hundred eighty-eight million, nineteen thousand, one hundred seventeen".