305005073 has 4 divisors (see below), whose sum is σ = 307333488. Its totient is φ = 302676660.

The previous prime is 305005069. The next prime is 305005079. The reversal of 305005073 is 370500503.

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, and also an emirpimes, since its reverse is a distinct semiprime: 370500503 = 89 ⋅4162927.

It is a cyclic number.

It is not a de Polignac number, because 305005073 - 2² = 305005069 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 (305005079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1164011 + ... + 1164272.

It is an arithmetic number, because the mean of its divisors is an integer number (76833372).

Almost surely, 2^305005073 is an apocalyptic number.

It is an amenable number.

305005073 is a deficient number, since it is larger than the sum of its proper divisors (2328415).

305005073 is a wasteful number, since it uses less digits than its factorization.

305005073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2328414.

The product of its (nonzero) digits is 1575, while the sum is 23.

The square root of 305005073 is about 17464.3944355365. The cubic root of 305005073 is about 673.1352817237.

Adding to 305005073 its reverse (370500503), we get a palindrome (675505576).

The spelling of 305005073 in words is "three hundred five million, five thousand, seventy-three".