340138289 has 2 divisors, whose sum is σ = 340138290. Its totient is φ = 340138288.

The previous prime is 340138229. The next prime is 340138301. The reversal of 340138289 is 982831043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 331240000 + 8898289 = 18200^2 + 2983^2 .

It is a cyclic number.

It is not a de Polignac number, because 340138289 - 2²⁸ = 71702833 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (340138219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170069144 + 170069145.

It is an arithmetic number, because the mean of its divisors is an integer number (170069145).

Almost surely, 2^340138289 is an apocalyptic number.

It is an amenable number.

340138289 is a deficient number, since it is larger than the sum of its proper divisors (1).

340138289 is an equidigital number, since it uses as much as digits as its factorization.

340138289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 340138289 is about 18442.8384203734. The cubic root of 340138289 is about 698.0478185809.

The spelling of 340138289 in words is "three hundred forty million, one hundred thirty-eight thousand, two hundred eighty-nine".