63125791 has 4 divisors (see below), whose sum is σ = 63261432. Its totient is φ = 62990152.

The previous prime is 63125759. The next prime is 63125813. The reversal of 63125791 is 19752136.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63125791 - 2⁵ = 63125759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63125891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67120 + ... + 68053.

It is an arithmetic number, because the mean of its divisors is an integer number (15815358).

Almost surely, 2^63125791 is an apocalyptic number.

63125791 is a deficient number, since it is larger than the sum of its proper divisors (135641).

63125791 is a wasteful number, since it uses less digits than its factorization.

63125791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135640.

The product of its digits is 11340, while the sum is 34.

The square root of 63125791 is about 7945.1740698364. The cubic root of 63125791 is about 398.1703751925.

The spelling of 63125791 in words is "sixty-three million, one hundred twenty-five thousand, seven hundred ninety-one".