63768191 has 2 divisors, whose sum is σ = 63768192. Its totient is φ = 63768190.

The previous prime is 63768181. The next prime is 63768217. The reversal of 63768191 is 19186736.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63768191 - 2⁶ = 63768127 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63768101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31884095 + 31884096.

It is an arithmetic number, because the mean of its divisors is an integer number (31884096).

Almost surely, 2^63768191 is an apocalyptic number.

63768191 is a deficient number, since it is larger than the sum of its proper divisors (1).

63768191 is an equidigital number, since it uses as much as digits as its factorization.

63768191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 41.

The square root of 63768191 is about 7985.4987946903. The cubic root of 63768191 is about 399.5164803407.

The spelling of 63768191 in words is "sixty-three million, seven hundred sixty-eight thousand, one hundred ninety-one".