63539309 has 2 divisors, whose sum is σ = 63539310. Its totient is φ = 63539308.

The previous prime is 63539303. The next prime is 63539339. The reversal of 63539309 is 90393536.

63539309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45941284 + 17598025 = 6778^2 + 4195^2 .

It is a cyclic number.

It is not a de Polignac number, because 63539309 - 2⁴ = 63539293 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63539303) 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, 31769654 + 31769655.

It is an arithmetic number, because the mean of its divisors is an integer number (31769655).

Almost surely, 2^63539309 is an apocalyptic number.

It is an amenable number.

63539309 is a deficient number, since it is larger than the sum of its proper divisors (1).

63539309 is an equidigital number, since it uses as much as digits as its factorization.

63539309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65610, while the sum is 38.

The square root of 63539309 is about 7971.1548096872. The cubic root of 63539309 is about 399.0379149193.

The spelling of 63539309 in words is "sixty-three million, five hundred thirty-nine thousand, three hundred nine".