340235213 has 2 divisors, whose sum is σ = 340235214. Its totient is φ = 340235212.

The previous prime is 340235197. The next prime is 340235227. The reversal of 340235213 is 312532043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 335732329 + 4502884 = 18323^2 + 2122^2 .

It is a cyclic number.

It is not a de Polignac number, because 340235213 - 2⁴ = 340235197 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340255213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170117606 + 170117607.

It is an arithmetic number, because the mean of its divisors is an integer number (170117607).

Almost surely, 2^340235213 is an apocalyptic number.

It is an amenable number.

340235213 is a deficient number, since it is larger than the sum of its proper divisors (1).

340235213 is an equidigital number, since it uses as much as digits as its factorization.

340235213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 340235213 is about 18445.4659198406. The cubic root of 340235213 is about 698.1141162835.

Adding to 340235213 its reverse (312532043), we get a palindrome (652767256).

The spelling of 340235213 in words is "three hundred forty million, two hundred thirty-five thousand, two hundred thirteen".