340430213 has 2 divisors, whose sum is σ = 340430214. Its totient is φ = 340430212.

The previous prime is 340430173. The next prime is 340430221. The reversal of 340430213 is 312034043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 276157924 + 64272289 = 16618^2 + 8017^2 .

It is a cyclic number.

It is not a de Polignac number, because 340430213 - 2¹⁰ = 340429189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340430243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170215106 + 170215107.

It is an arithmetic number, because the mean of its divisors is an integer number (170215107).

Almost surely, 2^340430213 is an apocalyptic number.

It is an amenable number.

340430213 is a deficient number, since it is larger than the sum of its proper divisors (1).

340430213 is an equidigital number, since it uses as much as digits as its factorization.

340430213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 340430213 is about 18450.7510145251. The cubic root of 340430213 is about 698.2474615384.

Adding to 340430213 its reverse (312034043), we get a palindrome (652464256).

The spelling of 340430213 in words is "three hundred forty million, four hundred thirty thousand, two hundred thirteen".