304728997 has 2 divisors, whose sum is σ = 304728998. Its totient is φ = 304728996.

The previous prime is 304728979. The next prime is 304729027. The reversal of 304728997 is 799827403.

Together with previous prime (304728979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231009601 + 73719396 = 15199^2 + 8586^2 .

It is an emirp because it is prime and its reverse (799827403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 304728997 - 2¹⁵ = 304696229 is a prime.

It is a super-2 number, since 2×304728997² = 185719523225252018, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 304728997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304728967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152364498 + 152364499.

It is an arithmetic number, because the mean of its divisors is an integer number (152364499).

Almost surely, 2^304728997 is an apocalyptic number.

It is an amenable number.

304728997 is a deficient number, since it is larger than the sum of its proper divisors (1).

304728997 is an equidigital number, since it uses as much as digits as its factorization.

304728997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 49.

The square root of 304728997 is about 17456.4886789984. The cubic root of 304728997 is about 672.9321237975.

The spelling of 304728997 in words is "three hundred four million, seven hundred twenty-eight thousand, nine hundred ninety-seven".