340580813 has 2 divisors, whose sum is σ = 340580814. Its totient is φ = 340580812.

The previous prime is 340580791. The next prime is 340580831. The reversal of 340580813 is 318085043.

It is a happy number.

Together with next prime (340580831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255904009 + 84676804 = 15997^2 + 9202^2 .

It is an emirp because it is prime and its reverse (318085043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340580813 - 2⁶ = 340580749 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 340580813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340580413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170290406 + 170290407.

It is an arithmetic number, because the mean of its divisors is an integer number (170290407).

Almost surely, 2^340580813 is an apocalyptic number.

It is an amenable number.

340580813 is a deficient number, since it is larger than the sum of its proper divisors (1).

340580813 is an equidigital number, since it uses as much as digits as its factorization.

340580813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 340580813 is about 18454.8316979592. The cubic root of 340580813 is about 698.3504102595.

The spelling of 340580813 in words is "three hundred forty million, five hundred eighty thousand, eight hundred thirteen".