48509309 has 2 divisors, whose sum is σ = 48509310. Its totient is φ = 48509308.

The previous prime is 48509297. The next prime is 48509333. The reversal of 48509309 is 90390584.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35164900 + 13344409 = 5930^2 + 3653^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-48509309 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (48509359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24254654 + 24254655.

It is an arithmetic number, because the mean of its divisors is an integer number (24254655).

Almost surely, 2^48509309 is an apocalyptic number.

It is an amenable number.

48509309 is a deficient number, since it is larger than the sum of its proper divisors (1).

48509309 is an equidigital number, since it uses as much as digits as its factorization.

48509309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 48509309 is about 6964.8624537747. The cubic root of 48509309 is about 364.7049821023.

The spelling of 48509309 in words is "forty-eight million, five hundred nine thousand, three hundred nine".