305343421 has 2 divisors, whose sum is σ = 305343422. Its totient is φ = 305343420.

The previous prime is 305343383. The next prime is 305343427. The reversal of 305343421 is 124343503.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 299636100 + 5707321 = 17310^2 + 2389^2 .

It is a cyclic number.

It is not a de Polignac number, because 305343421 - 2⁹ = 305342909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (305343427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152671710 + 152671711.

It is an arithmetic number, because the mean of its divisors is an integer number (152671711).

Almost surely, 2^305343421 is an apocalyptic number.

It is an amenable number.

305343421 is a deficient number, since it is larger than the sum of its proper divisors (1).

305343421 is an equidigital number, since it uses as much as digits as its factorization.

305343421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 305343421 is about 17474.0785450907. The cubic root of 305343421 is about 673.3840970507.

Adding to 305343421 its reverse (124343503), we get a palindrome (429686924).

The spelling of 305343421 in words is "three hundred five million, three hundred forty-three thousand, four hundred twenty-one".