340209029 has 2 divisors, whose sum is σ = 340209030. Its totient is φ = 340209028.

The previous prime is 340208993. The next prime is 340209047. The reversal of 340209029 is 920902043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 262504804 + 77704225 = 16202^2 + 8815^2 .

It is a cyclic number.

It is not a de Polignac number, because 340209029 - 2²⁰ = 339160453 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 340208992 and 340209010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340209059) 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, 170104514 + 170104515.

It is an arithmetic number, because the mean of its divisors is an integer number (170104515).

Almost surely, 2^340209029 is an apocalyptic number.

It is an amenable number.

340209029 is a deficient number, since it is larger than the sum of its proper divisors (1).

340209029 is an equidigital number, since it uses as much as digits as its factorization.

340209029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 340209029 is about 18444.7561382633. The cubic root of 340209029 is about 698.0962072133.

The spelling of 340209029 in words is "three hundred forty million, two hundred nine thousand, twenty-nine".