63257791 has 2 divisors, whose sum is σ = 63257792. Its totient is φ = 63257790.

The previous prime is 63257767. The next prime is 63257813. The reversal of 63257791 is 19775236.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63257791 - 2⁹ = 63257279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63251791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31628895 + 31628896.

It is an arithmetic number, because the mean of its divisors is an integer number (31628896).

Almost surely, 2^63257791 is an apocalyptic number.

63257791 is a deficient number, since it is larger than the sum of its proper divisors (1).

63257791 is an equidigital number, since it uses as much as digits as its factorization.

63257791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79380, while the sum is 40.

The square root of 63257791 is about 7953.4766611841. The cubic root of 63257791 is about 398.4477150712.

The spelling of 63257791 in words is "sixty-three million, two hundred fifty-seven thousand, seven hundred ninety-one".