63138913 has 2 divisors, whose sum is σ = 63138914. Its totient is φ = 63138912.

The previous prime is 63138883. The next prime is 63138917. The reversal of 63138913 is 31983136.

63138913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59166864 + 3972049 = 7692^2 + 1993^2 .

It is a cyclic number.

It is not a de Polignac number, because 63138913 - 2¹³ = 63130721 is a prime.

It is not a weakly prime, because it can be changed into another prime (63138917) 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, 31569456 + 31569457.

It is an arithmetic number, because the mean of its divisors is an integer number (31569457).

Almost surely, 2^63138913 is an apocalyptic number.

It is an amenable number.

63138913 is a deficient number, since it is larger than the sum of its proper divisors (1).

63138913 is an equidigital number, since it uses as much as digits as its factorization.

63138913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 34.

The square root of 63138913 is about 7945.9998112258. Note that the first 3 decimals coincide. The cubic root of 63138913 is about 398.1979625943.

The spelling of 63138913 in words is "sixty-three million, one hundred thirty-eight thousand, nine hundred thirteen".