63868393 has 2 divisors, whose sum is σ = 63868394. Its totient is φ = 63868392.

The previous prime is 63868381. The next prime is 63868397. The reversal of 63868393 is 39386836.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51667344 + 12201049 = 7188^2 + 3493^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63868393 is a prime.

It is not a weakly prime, because it can be changed into another prime (63868397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31934196 + 31934197.

It is an arithmetic number, because the mean of its divisors is an integer number (31934197).

Almost surely, 2^63868393 is an apocalyptic number.

It is an amenable number.

63868393 is a deficient number, since it is larger than the sum of its proper divisors (1).

63868393 is an equidigital number, since it uses as much as digits as its factorization.

63868393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 46.

The square root of 63868393 is about 7991.7703295328. The cubic root of 63868393 is about 399.7256305966.

It can be divided in two parts, 63868 and 393, that added together give a triangular number (64261 = T₃₅₈).

The spelling of 63868393 in words is "sixty-three million, eight hundred sixty-eight thousand, three hundred ninety-three".