340505329 has 2 divisors, whose sum is σ = 340505330. Its totient is φ = 340505328.

The previous prime is 340505303. The next prime is 340505353. The reversal of 340505329 is 923505043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 325874704 + 14630625 = 18052^2 + 3825^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340505329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 340505329.

It is not a weakly prime, because it can be changed into another prime (340505129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170252664 + 170252665.

It is an arithmetic number, because the mean of its divisors is an integer number (170252665).

Almost surely, 2^340505329 is an apocalyptic number.

It is an amenable number.

340505329 is a deficient number, since it is larger than the sum of its proper divisors (1).

340505329 is an equidigital number, since it uses as much as digits as its factorization.

340505329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 340505329 is about 18452.7864833472. The cubic root of 340505329 is about 698.2988139127.

The spelling of 340505329 in words is "three hundred forty million, five hundred five thousand, three hundred twenty-nine".