304813 has 2 divisors, whose sum is σ = 304814. Its totient is φ = 304812.

The previous prime is 304807. The next prime is 304831. The reversal of 304813 is 318403.

Together with next prime (304831) 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., 227529 + 77284 = 477^2 + 278^2 .

It is an emirp because it is prime and its reverse (318403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 304813 - 2⁵ = 304781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152406 + 152407.

It is an arithmetic number, because the mean of its divisors is an integer number (152407).

2³⁰⁴⁸¹³ is an apocalyptic number.

It is an amenable number.

304813 is a deficient number, since it is larger than the sum of its proper divisors (1).

304813 is an equidigital number, since it uses as much as digits as its factorization.

304813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 304813 is about 552.0987230559. The cubic root of 304813 is about 67.2993952640.

The spelling of 304813 in words is "three hundred four thousand, eight hundred thirteen".