304219961 has 2 divisors, whose sum is σ = 304219962. Its totient is φ = 304219960.

The previous prime is 304219943. The next prime is 304219997. The reversal of 304219961 is 169912403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215502400 + 88717561 = 14680^2 + 9419^2 .

It is an emirp because it is prime and its reverse (169912403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 304219961 - 2⁶ = 304219897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (304219921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152109980 + 152109981.

It is an arithmetic number, because the mean of its divisors is an integer number (152109981).

Almost surely, 2^304219961 is an apocalyptic number.

It is an amenable number.

304219961 is a deficient number, since it is larger than the sum of its proper divisors (1).

304219961 is an equidigital number, since it uses as much as digits as its factorization.

304219961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 304219961 is about 17441.9024478409. The cubic root of 304219961 is about 672.5572140762.

The spelling of 304219961 in words is "three hundred four million, two hundred nineteen thousand, nine hundred sixty-one".