305213329 has 2 divisors, whose sum is σ = 305213330. Its totient is φ = 305213328.

The previous prime is 305213231. The next prime is 305213357. The reversal of 305213329 is 923312503.

It is an a-pointer prime, because the next prime (305213357) can be obtained adding 305213329 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231648400 + 73564929 = 15220^2 + 8577^2 .

It is an emirp because it is prime and its reverse (923312503) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 305213329 - 2⁷ = 305213201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 305213297 and 305213306.

It is not a weakly prime, because it can be changed into another prime (305213369) 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, 152606664 + 152606665.

It is an arithmetic number, because the mean of its divisors is an integer number (152606665).

Almost surely, 2^305213329 is an apocalyptic number.

It is an amenable number.

305213329 is a deficient number, since it is larger than the sum of its proper divisors (1).

305213329 is an equidigital number, since it uses as much as digits as its factorization.

305213329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 28.

The square root of 305213329 is about 17470.3557204769. The cubic root of 305213329 is about 673.2884513811.

The spelling of 305213329 in words is "three hundred five million, two hundred thirteen thousand, three hundred twenty-nine".