63138875 has 8 divisors (see below), whose sum is σ = 78797472. Its totient is φ = 50511000.

The previous prime is 63138871. The next prime is 63138883. The reversal of 63138875 is 57883136.

It is not a de Polignac number, because 63138875 - 2² = 63138871 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63138871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252431 + ... + 252680.

It is an arithmetic number, because the mean of its divisors is an integer number (9849684).

Almost surely, 2^63138875 is an apocalyptic number.

63138875 is a deficient number, since it is larger than the sum of its proper divisors (15658597).

63138875 is an equidigital number, since it uses as much as digits as its factorization.

63138875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505126 (or 505116 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 63138875 is about 7945.9974200852. The cubic root of 63138875 is about 398.1978827094.

Adding to 63138875 its sum of digits (41), we get a square (63138916 = 7946²).

The spelling of 63138875 in words is "sixty-three million, one hundred thirty-eight thousand, eight hundred seventy-five".