346605221 has 2 divisors, whose sum is σ = 346605222. Its totient is φ = 346605220.

The previous prime is 346605211. The next prime is 346605263. The reversal of 346605221 is 122506643.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 325802500 + 20802721 = 18050^2 + 4561^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-346605221 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (346605211) 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, 173302610 + 173302611.

It is an arithmetic number, because the mean of its divisors is an integer number (173302611).

Almost surely, 2^346605221 is an apocalyptic number.

It is an amenable number.

346605221 is a deficient number, since it is larger than the sum of its proper divisors (1).

346605221 is an equidigital number, since it uses as much as digits as its factorization.

346605221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 346605221 is about 18617.3365710566. The cubic root of 346605221 is about 702.4439883914.

The spelling of 346605221 in words is "three hundred forty-six million, six hundred five thousand, two hundred twenty-one".