63440863 has 2 divisors, whose sum is σ = 63440864. Its totient is φ = 63440862.

The previous prime is 63440809. The next prime is 63440873. The reversal of 63440863 is 36804436.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63440863 - 2¹³ = 63432671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63440873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31720431 + 31720432.

It is an arithmetic number, because the mean of its divisors is an integer number (31720432).

Almost surely, 2^63440863 is an apocalyptic number.

63440863 is a deficient number, since it is larger than the sum of its proper divisors (1).

63440863 is an equidigital number, since it uses as much as digits as its factorization.

63440863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 63440863 is about 7964.9772755482. The cubic root of 63440863 is about 398.8317223905.

The spelling of 63440863 in words is "sixty-three million, four hundred forty thousand, eight hundred sixty-three".