305343247249 has 2 divisors, whose sum is σ = 305343247250. Its totient is φ = 305343247248.

The previous prime is 305343247247. The next prime is 305343247271. The reversal of 305343247249 is 942742343503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 229824360000 + 75518887249 = 479400^2 + 274807^2 .

It is an emirp because it is prime and its reverse (942742343503) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 305343247249 - 2¹ = 305343247247 is a prime.

Together with 305343247247, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 305343247199 and 305343247208.

It is not a weakly prime, because it can be changed into another prime (305343247241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152671623624 + 152671623625.

It is an arithmetic number, because the mean of its divisors is an integer number (152671623625).

Almost surely, 2^305343247249 is an apocalyptic number.

It is an amenable number.

305343247249 is a deficient number, since it is larger than the sum of its proper divisors (1).

305343247249 is an equidigital number, since it uses as much as digits as its factorization.

305343247249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 46.

The spelling of 305343247249 in words is "three hundred five billion, three hundred forty-three million, two hundred forty-seven thousand, two hundred forty-nine".