689314299389 has 2 divisors, whose sum is σ = 689314299390. Its totient is φ = 689314299388.

The previous prime is 689314299307. The next prime is 689314299391. The reversal of 689314299389 is 983992413986.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 521078972164 + 168235327225 = 721858^2 + 410165^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-689314299389 is a prime.

It is a Sophie Germain prime.

Together with 689314299391, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689314299889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344657149694 + 344657149695.

It is an arithmetic number, because the mean of its divisors is an integer number (344657149695).

Almost surely, 2^689314299389 is an apocalyptic number.

It is an amenable number.

689314299389 is a deficient number, since it is larger than the sum of its proper divisors (1).

689314299389 is an equidigital number, since it uses as much as digits as its factorization.

689314299389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181398528, while the sum is 71.

The spelling of 689314299389 in words is "six hundred eighty-nine billion, three hundred fourteen million, two hundred ninety-nine thousand, three hundred eighty-nine".