305294993 has 4 divisors (see below), whose sum is σ = 323253540. Its totient is φ = 287336448.

The previous prime is 305294981. The next prime is 305295017. The reversal of 305294993 is 399492503.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 189667984 + 115627009 = 13772^2 + 10753^2 .

It is not a de Polignac number, because 305294993 - 2⁶ = 305294929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (305294953) 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, 8979248 + ... + 8979281.

It is an arithmetic number, because the mean of its divisors is an integer number (80813385).

Almost surely, 2^305294993 is an apocalyptic number.

It is an amenable number.

305294993 is a deficient number, since it is larger than the sum of its proper divisors (17958547).

305294993 is a wasteful number, since it uses less digits than its factorization.

305294993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17958546.

The product of its (nonzero) digits is 262440, while the sum is 44.

The square root of 305294993 is about 17472.6927804503. The cubic root of 305294993 is about 673.3484952037.

The spelling of 305294993 in words is "three hundred five million, two hundred ninety-four thousand, nine hundred ninety-three".