340662409 has 2 divisors, whose sum is σ = 340662410. Its totient is φ = 340662408.

The previous prime is 340662397. The next prime is 340662433. The reversal of 340662409 is 904266043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 339591184 + 1071225 = 18428^2 + 1035^2 .

It is a cyclic number.

It is not a de Polignac number, because 340662409 - 2⁷ = 340662281 is a prime.

It is not a weakly prime, because it can be changed into another prime (340662479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170331204 + 170331205.

It is an arithmetic number, because the mean of its divisors is an integer number (170331205).

Almost surely, 2^340662409 is an apocalyptic number.

It is an amenable number.

340662409 is a deficient number, since it is larger than the sum of its proper divisors (1).

340662409 is an equidigital number, since it uses as much as digits as its factorization.

340662409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 340662409 is about 18457.0422603406. The cubic root of 340662409 is about 698.4061758301.

The spelling of 340662409 in words is "three hundred forty million, six hundred sixty-two thousand, four hundred nine".