63798551 has 2 divisors, whose sum is σ = 63798552. Its totient is φ = 63798550.

The previous prime is 63798533. The next prime is 63798563. The reversal of 63798551 is 15589736.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63798551 - 2⁶ = 63798487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63798151) 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, 31899275 + 31899276.

It is an arithmetic number, because the mean of its divisors is an integer number (31899276).

Almost surely, 2^63798551 is an apocalyptic number.

63798551 is a deficient number, since it is larger than the sum of its proper divisors (1).

63798551 is an equidigital number, since it uses as much as digits as its factorization.

63798551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 44.

The square root of 63798551 is about 7987.3995142349. The cubic root of 63798551 is about 399.5798734721.

The spelling of 63798551 in words is "sixty-three million, seven hundred ninety-eight thousand, five hundred fifty-one".