340846409 has 2 divisors, whose sum is σ = 340846410. Its totient is φ = 340846408.

The previous prime is 340846399. The next prime is 340846427. The reversal of 340846409 is 904648043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 258309184 + 82537225 = 16072^2 + 9085^2 .

It is a cyclic number.

It is not a de Polignac number, because 340846409 - 2⁸ = 340846153 is a prime.

It is not a weakly prime, because it can be changed into another prime (340846439) 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, 170423204 + 170423205.

It is an arithmetic number, because the mean of its divisors is an integer number (170423205).

Almost surely, 2^340846409 is an apocalyptic number.

It is an amenable number.

340846409 is a deficient number, since it is larger than the sum of its proper divisors (1).

340846409 is an equidigital number, since it uses as much as digits as its factorization.

340846409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 340846409 is about 18462.0261347448. The cubic root of 340846409 is about 698.5318952162.

The spelling of 340846409 in words is "three hundred forty million, eight hundred forty-six thousand, four hundred nine".