340424009 has 2 divisors, whose sum is σ = 340424010. Its totient is φ = 340424008.

The previous prime is 340423987. The next prime is 340424017. The reversal of 340424009 is 900424043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 275460409 + 64963600 = 16597^2 + 8060^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340424009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (340424059) 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, 170212004 + 170212005.

It is an arithmetic number, because the mean of its divisors is an integer number (170212005).

Almost surely, 2^340424009 is an apocalyptic number.

It is an amenable number.

340424009 is a deficient number, since it is larger than the sum of its proper divisors (1).

340424009 is an equidigital number, since it uses as much as digits as its factorization.

340424009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 340424009 is about 18450.5828905214. The cubic root of 340424009 is about 698.2432198922.

The spelling of 340424009 in words is "three hundred forty million, four hundred twenty-four thousand, nine".