340354247 has 2 divisors, whose sum is σ = 340354248. Its totient is φ = 340354246.

The previous prime is 340354241. The next prime is 340354249. The reversal of 340354247 is 742453043.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 340354247 - 2¹⁴ = 340337863 is a prime.

Together with 340354249, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340354241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170177123 + 170177124.

It is an arithmetic number, because the mean of its divisors is an integer number (170177124).

Almost surely, 2^340354247 is an apocalyptic number.

340354247 is a deficient number, since it is larger than the sum of its proper divisors (1).

340354247 is an equidigital number, since it uses as much as digits as its factorization.

340354247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 32.

The square root of 340354247 is about 18448.6922842786. The cubic root of 340354247 is about 698.1955203861.

The spelling of 340354247 in words is "three hundred forty million, three hundred fifty-four thousand, two hundred forty-seven".