340278427 has 2 divisors, whose sum is σ = 340278428. Its totient is φ = 340278426.

The previous prime is 340278361. The next prime is 340278437. The reversal of 340278427 is 724872043.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 340278427 - 2⁷ = 340278299 is a prime.

It is not a weakly prime, because it can be changed into another prime (340278437) 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, 170139213 + 170139214.

It is an arithmetic number, because the mean of its divisors is an integer number (170139214).

Almost surely, 2^340278427 is an apocalyptic number.

340278427 is a deficient number, since it is larger than the sum of its proper divisors (1).

340278427 is an equidigital number, since it uses as much as digits as its factorization.

340278427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75264, while the sum is 37.

The square root of 340278427 is about 18446.6372816294. The cubic root of 340278427 is about 698.1436713532.

The spelling of 340278427 in words is "three hundred forty million, two hundred seventy-eight thousand, four hundred twenty-seven".