304997249 has 4 divisors (see below), whose sum is σ = 305072064. Its totient is φ = 304922436.

The previous prime is 304997219. The next prime is 304997257. The reversal of 304997249 is 942799403.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-304997249 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (304997219) 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 in 3 ways as a sum of consecutive naturals, for example, 30917 + ... + 39570.

It is an arithmetic number, because the mean of its divisors is an integer number (76268016).

Almost surely, 2^304997249 is an apocalyptic number.

It is an amenable number.

304997249 is a deficient number, since it is larger than the sum of its proper divisors (74815).

304997249 is an equidigital number, since it uses as much as digits as its factorization.

304997249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74814.

The product of its (nonzero) digits is 489888, while the sum is 47.

The square root of 304997249 is about 17464.1704354945. The cubic root of 304997249 is about 673.1295259118.

The spelling of 304997249 in words is "three hundred four million, nine hundred ninety-seven thousand, two hundred forty-nine".