340456427 has 2 divisors, whose sum is σ = 340456428. Its totient is φ = 340456426.

The previous prime is 340456409. The next prime is 340456429. The reversal of 340456427 is 724654043.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 340456427 - 2¹² = 340452331 is a prime.

Together with 340456429, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (340456429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170228213 + 170228214.

It is an arithmetic number, because the mean of its divisors is an integer number (170228214).

Almost surely, 2^340456427 is an apocalyptic number.

340456427 is a deficient number, since it is larger than the sum of its proper divisors (1).

340456427 is an equidigital number, since it uses as much as digits as its factorization.

340456427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 35.

The square root of 340456427 is about 18451.4613784383. The cubic root of 340456427 is about 698.2653833606.

The spelling of 340456427 in words is "three hundred forty million, four hundred fifty-six thousand, four hundred twenty-seven".