340304813 has 2 divisors, whose sum is σ = 340304814. Its totient is φ = 340304812.

The previous prime is 340304771. The next prime is 340304819. The reversal of 340304813 is 318403043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188842564 + 151462249 = 13742^2 + 12307^2 .

It is a cyclic number.

It is not a de Polignac number, because 340304813 - 2¹² = 340300717 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 (340304819) 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, 170152406 + 170152407.

It is an arithmetic number, because the mean of its divisors is an integer number (170152407).

Almost surely, 2^340304813 is an apocalyptic number.

It is an amenable number.

340304813 is a deficient number, since it is larger than the sum of its proper divisors (1).

340304813 is an equidigital number, since it uses as much as digits as its factorization.

340304813 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 340304813 is about 18447.3524658689. The cubic root of 340304813 is about 698.1617161280.

Adding to 340304813 its reverse (318403043), we get a palindrome (658707856).

The spelling of 340304813 in words is "three hundred forty million, three hundred four thousand, eight hundred thirteen".