345456427 has 2 divisors, whose sum is σ = 345456428. Its totient is φ = 345456426.

The previous prime is 345456421. The next prime is 345456443. The reversal of 345456427 is 724654543.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345456427 is a prime.

It is equal to p_18572395 and since 345456427 and 18572395 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 345456427.

It is not a weakly prime, because it can be changed into another prime (345456421) 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, 172728213 + 172728214.

It is an arithmetic number, because the mean of its divisors is an integer number (172728214).

Almost surely, 2^345456427 is an apocalyptic number.

345456427 is a deficient number, since it is larger than the sum of its proper divisors (1).

345456427 is an equidigital number, since it uses as much as digits as its factorization.

345456427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 40.

The square root of 345456427 is about 18586.4581617908. The cubic root of 345456427 is about 701.6670654706.

The spelling of 345456427 in words is "three hundred forty-five million, four hundred fifty-six thousand, four hundred twenty-seven".