343946621 has 2 divisors, whose sum is σ = 343946622. Its totient is φ = 343946620.

The previous prime is 343946599. The next prime is 343946677. The reversal of 343946621 is 126649343.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231374521 + 112572100 = 15211^2 + 10610^2 .

It is a cyclic number.

It is not a de Polignac number, because 343946621 - 2¹⁸ = 343684477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343946021) 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, 171973310 + 171973311.

It is an arithmetic number, because the mean of its divisors is an integer number (171973311).

Almost surely, 2^343946621 is an apocalyptic number.

It is an amenable number.

343946621 is a deficient number, since it is larger than the sum of its proper divisors (1).

343946621 is an equidigital number, since it uses as much as digits as its factorization.

343946621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 38.

The square root of 343946621 is about 18545.7979337639. The cubic root of 343946621 is about 700.6433683644.

The spelling of 343946621 in words is "three hundred forty-three million, nine hundred forty-six thousand, six hundred twenty-one".