304890947 has 2 divisors, whose sum is σ = 304890948. Its totient is φ = 304890946.

The previous prime is 304890931. The next prime is 304890959. The reversal of 304890947 is 749098403.

It is a strong prime.

It is an emirp because it is prime and its reverse (749098403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 304890947 - 2⁴ = 304890931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 304890898 and 304890907.

It is not a weakly prime, because it can be changed into another prime (304890247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152445473 + 152445474.

It is an arithmetic number, because the mean of its divisors is an integer number (152445474).

Almost surely, 2^304890947 is an apocalyptic number.

304890947 is a deficient number, since it is larger than the sum of its proper divisors (1).

304890947 is an equidigital number, since it uses as much as digits as its factorization.

304890947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 304890947 is about 17461.1267391311. The cubic root of 304890947 is about 673.0513139172.

The spelling of 304890947 in words is "three hundred four million, eight hundred ninety thousand, nine hundred forty-seven".