147308509 has 2 divisors, whose sum is σ = 147308510. Its totient is φ = 147308508.

The previous prime is 147308489. The next prime is 147308521. The reversal of 147308509 is 905803741.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127193284 + 20115225 = 11278^2 + 4485^2 .

It is a cyclic number.

It is not a de Polignac number, because 147308509 - 2⁹ = 147307997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147308569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73654254 + 73654255.

It is an arithmetic number, because the mean of its divisors is an integer number (73654255).

Almost surely, 2^147308509 is an apocalyptic number.

It is an amenable number.

147308509 is a deficient number, since it is larger than the sum of its proper divisors (1).

147308509 is an equidigital number, since it uses as much as digits as its factorization.

147308509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 147308509 is about 12137.0716814230. The cubic root of 147308509 is about 528.1321564755.

The spelling of 147308509 in words is "one hundred forty-seven million, three hundred eight thousand, five hundred nine".