340440313 has 2 divisors, whose sum is σ = 340440314. Its totient is φ = 340440312.

The previous prime is 340440307. The next prime is 340440323. The reversal of 340440313 is 313044043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 312688489 + 27751824 = 17683^2 + 5268^2 .

It is a cyclic number.

It is not a de Polignac number, because 340440313 - 2⁵ = 340440281 is a prime.

It is not a weakly prime, because it can be changed into another prime (340440323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170220156 + 170220157.

It is an arithmetic number, because the mean of its divisors is an integer number (170220157).

Almost surely, 2^340440313 is an apocalyptic number.

It is an amenable number.

340440313 is a deficient number, since it is larger than the sum of its proper divisors (1).

340440313 is an equidigital number, since it uses as much as digits as its factorization.

340440313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 340440313 is about 18451.0247140911. The cubic root of 340440313 is about 698.2543667517.

Adding to 340440313 its reverse (313044043), we get a palindrome (653484356).

The spelling of 340440313 in words is "three hundred forty million, four hundred forty thousand, three hundred thirteen".