689204389 has 2 divisors, whose sum is σ = 689204390. Its totient is φ = 689204388.

The previous prime is 689204371. The next prime is 689204419. The reversal of 689204389 is 983402986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 676884289 + 12320100 = 26017^2 + 3510^2 .

It is a cyclic number.

It is not a de Polignac number, because 689204389 - 2⁵ = 689204357 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689204339) 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, 344602194 + 344602195.

It is an arithmetic number, because the mean of its divisors is an integer number (344602195).

Almost surely, 2^689204389 is an apocalyptic number.

It is an amenable number.

689204389 is a deficient number, since it is larger than the sum of its proper divisors (1).

689204389 is an equidigital number, since it uses as much as digits as its factorization.

689204389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 746496, while the sum is 49.

The square root of 689204389 is about 26252.7025085038. The cubic root of 689204389 is about 883.3158258149.

The spelling of 689204389 in words is "six hundred eighty-nine million, two hundred four thousand, three hundred eighty-nine".