63138889 has 6 divisors (see below), whose sum is σ = 69400730. Its totient is φ = 57398880.

The previous prime is 63138883. The next prime is 63138913. The reversal of 63138889 is 98883136.

63138889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 54641664 + 8497225 = 7392^2 + 2915^2 .

It is not a de Polignac number, because 63138889 - 2⁹ = 63138377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63138883) 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 in 5 ways as a sum of consecutive naturals, for example, 260784 + ... + 261025.

Almost surely, 2^63138889 is an apocalyptic number.

It is an amenable number.

63138889 is a deficient number, since it is larger than the sum of its proper divisors (6261841).

63138889 is a wasteful number, since it uses less digits than its factorization.

63138889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521831 (or 521820 counting only the distinct ones).

The product of its digits is 248832, while the sum is 46.

The square root of 63138889 is about 7945.9983010318. The cubic root of 63138889 is about 398.1979121407.

The spelling of 63138889 in words is "sixty-three million, one hundred thirty-eight thousand, eight hundred eighty-nine".