340460509 has 2 divisors, whose sum is σ = 340460510. Its totient is φ = 340460508.

The previous prime is 340460489. The next prime is 340460521. The reversal of 340460509 is 905064043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 315240025 + 25220484 = 17755^2 + 5022^2 .

It is a cyclic number.

It is not a de Polignac number, because 340460509 - 2⁹ = 340459997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340460579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170230254 + 170230255.

It is an arithmetic number, because the mean of its divisors is an integer number (170230255).

Almost surely, 2^340460509 is an apocalyptic number.

It is an amenable number.

340460509 is a deficient number, since it is larger than the sum of its proper divisors (1).

340460509 is an equidigital number, since it uses as much as digits as its factorization.

340460509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 340460509 is about 18451.5719926515. The cubic root of 340460509 is about 698.2681740338.

The spelling of 340460509 in words is "three hundred forty million, four hundred sixty thousand, five hundred nine".