346821427 has 2 divisors, whose sum is σ = 346821428. Its totient is φ = 346821426.

The previous prime is 346821389. The next prime is 346821443. The reversal of 346821427 is 724128643.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 346821427 - 2¹⁹ = 346297139 is a prime.

It is not a weakly prime, because it can be changed into another prime (346821487) 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, 173410713 + 173410714.

It is an arithmetic number, because the mean of its divisors is an integer number (173410714).

Almost surely, 2^346821427 is an apocalyptic number.

346821427 is a deficient number, since it is larger than the sum of its proper divisors (1).

346821427 is an equidigital number, since it uses as much as digits as its factorization.

346821427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 37.

The square root of 346821427 is about 18623.1422429192. The cubic root of 346821427 is about 702.5900152718.

The spelling of 346821427 in words is "three hundred forty-six million, eight hundred twenty-one thousand, four hundred twenty-seven".