63125813 has 2 divisors, whose sum is σ = 63125814. Its totient is φ = 63125812.

The previous prime is 63125759. The next prime is 63125857. The reversal of 63125813 is 31852136.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34374769 + 28751044 = 5863^2 + 5362^2 .

It is a cyclic number.

It is not a de Polignac number, because 63125813 - 2¹² = 63121717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63125113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31562906 + 31562907.

It is an arithmetic number, because the mean of its divisors is an integer number (31562907).

Almost surely, 2^63125813 is an apocalyptic number.

It is an amenable number.

63125813 is a deficient number, since it is larger than the sum of its proper divisors (1).

63125813 is an equidigital number, since it uses as much as digits as its factorization.

63125813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 63125813 is about 7945.1754543245. The cubic root of 63125813 is about 398.1704214480.

Adding to 63125813 its reverse (31852136), we get a palindrome (94977949).

The spelling of 63125813 in words is "sixty-three million, one hundred twenty-five thousand, eight hundred thirteen".