340244309 has 2 divisors, whose sum is σ = 340244310. Its totient is φ = 340244308.

The previous prime is 340244293. The next prime is 340244321. The reversal of 340244309 is 903442043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 339370084 + 874225 = 18422^2 + 935^2 .

It is a cyclic number.

It is not a de Polignac number, because 340244309 - 2⁴ = 340244293 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 (340244909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170122154 + 170122155.

It is an arithmetic number, because the mean of its divisors is an integer number (170122155).

Almost surely, 2^340244309 is an apocalyptic number.

It is an amenable number.

340244309 is a deficient number, since it is larger than the sum of its proper divisors (1).

340244309 is an equidigital number, since it uses as much as digits as its factorization.

340244309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 340244309 is about 18445.7124828509. The cubic root of 340244309 is about 698.1203374595.

The spelling of 340244309 in words is "three hundred forty million, two hundred forty-four thousand, three hundred nine".