63605389 has 2 divisors, whose sum is σ = 63605390. Its totient is φ = 63605388.

The previous prime is 63605387. The next prime is 63605413. The reversal of 63605389 is 98350636.

63605389 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., 63329764 + 275625 = 7958^2 + 525^2 .

It is a cyclic number.

It is not a de Polignac number, because 63605389 - 2¹ = 63605387 is a prime.

Together with 63605387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63605383) 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, 31802694 + 31802695.

It is an arithmetic number, because the mean of its divisors is an integer number (31802695).

Almost surely, 2^63605389 is an apocalyptic number.

It is an amenable number.

63605389 is a deficient number, since it is larger than the sum of its proper divisors (1).

63605389 is an equidigital number, since it uses as much as digits as its factorization.

63605389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 63605389 is about 7975.2986777926. The cubic root of 63605389 is about 399.1761982916.

The spelling of 63605389 in words is "sixty-three million, six hundred five thousand, three hundred eighty-nine".