14728309 has 2 divisors, whose sum is σ = 14728310. Its totient is φ = 14728308.

The previous prime is 14728297. The next prime is 14728313. The reversal of 14728309 is 90382741.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13912900 + 815409 = 3730^2 + 903^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14728309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14728339) 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 as a sum of consecutive naturals, namely, 7364154 + 7364155.

It is an arithmetic number, because the mean of its divisors is an integer number (7364155).

Almost surely, 2^14728309 is an apocalyptic number.

It is an amenable number.

14728309 is a deficient number, since it is larger than the sum of its proper divisors (1).

14728309 is an equidigital number, since it uses as much as digits as its factorization.

14728309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 14728309 is about 3837.7479073019. The cubic root of 14728309 is about 245.1231312208.

The spelling of 14728309 in words is "fourteen million, seven hundred twenty-eight thousand, three hundred nine".