304219997 has 2 divisors, whose sum is σ = 304219998. Its totient is φ = 304219996.

The previous prime is 304219961. The next prime is 304220003. The reversal of 304219997 is 799912403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183087961 + 121132036 = 13531^2 + 11006^2 .

It is a cyclic number.

It is not a de Polignac number, because 304219997 - 2¹⁸ = 303957853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304219907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152109998 + 152109999.

It is an arithmetic number, because the mean of its divisors is an integer number (152109999).

Almost surely, 2^304219997 is an apocalyptic number.

It is an amenable number.

304219997 is a deficient number, since it is larger than the sum of its proper divisors (1).

304219997 is an equidigital number, since it uses as much as digits as its factorization.

304219997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 304219997 is about 17441.9034798384. The cubic root of 304219997 is about 672.5572406053.

The spelling of 304219997 in words is "three hundred four million, two hundred nineteen thousand, nine hundred ninety-seven".