340434223 has 2 divisors, whose sum is σ = 340434224. Its totient is φ = 340434222.

The previous prime is 340434221. The next prime is 340434239. The reversal of 340434223 is 322434043.

It is a weak prime.

It is an emirp because it is prime and its reverse (322434043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340434223 - 2¹ = 340434221 is a prime.

It is a super-2 number, since 2×340434223² = 231790920379227458, which contains 22 as substring.

Together with 340434221, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340434221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170217111 + 170217112.

It is an arithmetic number, because the mean of its divisors is an integer number (170217112).

Almost surely, 2^340434223 is an apocalyptic number.

340434223 is a deficient number, since it is larger than the sum of its proper divisors (1).

340434223 is an equidigital number, since it uses as much as digits as its factorization.

340434223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 25.

The square root of 340434223 is about 18450.8596818685. The cubic root of 340434223 is about 698.2502031295.

Adding to 340434223 its reverse (322434043), we get a palindrome (662868266).

The spelling of 340434223 in words is "three hundred forty million, four hundred thirty-four thousand, two hundred twenty-three".