305005493 has 12 divisors (see below), whose sum is σ = 336310380. Its totient is φ = 274974336.

The previous prime is 305005487. The next prime is 305005501. The reversal of 305005493 is 394500503.

It can be written as a sum of positive squares in 2 ways, for example, as 39413284 + 265592209 = 6278^2 + 16297^2 .

It is not a de Polignac number, because 305005493 - 2⁸ = 305005237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305005793) 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 11 ways as a sum of consecutive naturals, for example, 17693 + ... + 30381.

It is an arithmetic number, because the mean of its divisors is an integer number (28025865).

Almost surely, 2^305005493 is an apocalyptic number.

It is an amenable number.

305005493 is a deficient number, since it is larger than the sum of its proper divisors (31304887).

305005493 is a wasteful number, since it uses less digits than its factorization.

305005493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12788 (or 12745 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 29.

The square root of 305005493 is about 17464.4064599974. The cubic root of 305005493 is about 673.1355906986.

Adding to 305005493 its reverse (394500503), we get a palindrome (699505996).

The spelling of 305005493 in words is "three hundred five million, five thousand, four hundred ninety-three".