305240723 has 4 divisors (see below), whose sum is σ = 305278248. Its totient is φ = 305203200.

The previous prime is 305240711. The next prime is 305240791. The reversal of 305240723 is 327042503.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-305240723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 305240692 and 305240701.

It is not an unprimeable number, because it can be changed into a prime (305240123) 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, 878 + ... + 24723.

It is an arithmetic number, because the mean of its divisors is an integer number (76319562).

Almost surely, 2^305240723 is an apocalyptic number.

305240723 is a deficient number, since it is larger than the sum of its proper divisors (37525).

305240723 is a wasteful number, since it uses less digits than its factorization.

305240723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37524.

The product of its (nonzero) digits is 5040, while the sum is 26.

The square root of 305240723 is about 17471.1397166871. The cubic root of 305240723 is about 673.3085941362.

The spelling of 305240723 in words is "three hundred five million, two hundred forty thousand, seven hundred twenty-three".