304978243 has 2 divisors, whose sum is σ = 304978244. Its totient is φ = 304978242.

The previous prime is 304978211. The next prime is 304978259. The reversal of 304978243 is 342879403.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 304978243 - 2⁵ = 304978211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 304978196 and 304978205.

It is not a weakly prime, because it can be changed into another prime (304978273) 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, 152489121 + 152489122.

It is an arithmetic number, because the mean of its divisors is an integer number (152489122).

Almost surely, 2^304978243 is an apocalyptic number.

304978243 is a deficient number, since it is larger than the sum of its proper divisors (1).

304978243 is an equidigital number, since it uses as much as digits as its factorization.

304978243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 304978243 is about 17463.6262843660. The cubic root of 304978243 is about 673.1155435283.

The spelling of 304978243 in words is "three hundred four million, nine hundred seventy-eight thousand, two hundred forty-three".