346306621 has 2 divisors, whose sum is σ = 346306622. Its totient is φ = 346306620.

The previous prime is 346306619. The next prime is 346306651. The reversal of 346306621 is 126603643.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 316484100 + 29822521 = 17790^2 + 5461^2 .

It is a cyclic number.

It is not a de Polignac number, because 346306621 - 2¹ = 346306619 is a prime.

Together with 346306619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (346306651) 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, 173153310 + 173153311.

It is an arithmetic number, because the mean of its divisors is an integer number (173153311).

Almost surely, 2^346306621 is an apocalyptic number.

It is an amenable number.

346306621 is a deficient number, since it is larger than the sum of its proper divisors (1).

346306621 is an equidigital number, since it uses as much as digits as its factorization.

346306621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 346306621 is about 18609.3154360928. The cubic root of 346306621 is about 702.2422122072.

The spelling of 346306621 in words is "three hundred forty-six million, three hundred six thousand, six hundred twenty-one".