63840863 has 2 divisors, whose sum is σ = 63840864. Its totient is φ = 63840862.

The previous prime is 63840859. The next prime is 63840871. The reversal of 63840863 is 36804836.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63840863 - 2² = 63840859 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63840823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31920431 + 31920432.

It is an arithmetic number, because the mean of its divisors is an integer number (31920432).

Almost surely, 2^63840863 is an apocalyptic number.

63840863 is a deficient number, since it is larger than the sum of its proper divisors (1).

63840863 is an equidigital number, since it uses as much as digits as its factorization.

63840863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 63840863 is about 7990.0477470413. The cubic root of 63840863 is about 399.6681894138.

The spelling of 63840863 in words is "sixty-three million, eight hundred forty thousand, eight hundred sixty-three".