345455447 has 2 divisors, whose sum is σ = 345455448. Its totient is φ = 345455446.

The previous prime is 345455441. The next prime is 345455459. The reversal of 345455447 is 744554543.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 345455447 - 2¹⁰ = 345454423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345455441) 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, 172727723 + 172727724.

It is an arithmetic number, because the mean of its divisors is an integer number (172727724).

Almost surely, 2^345455447 is an apocalyptic number.

345455447 is a deficient number, since it is larger than the sum of its proper divisors (1).

345455447 is an equidigital number, since it uses as much as digits as its factorization.

345455447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672000, while the sum is 41.

The square root of 345455447 is about 18586.4317984921. The cubic root of 345455447 is about 701.6664019673. Note that the first 3 decimals are identical.

The spelling of 345455447 in words is "three hundred forty-five million, four hundred fifty-five thousand, four hundred forty-seven".