16863563 has 2 divisors, whose sum is σ = 16863564. Its totient is φ = 16863562.

The previous prime is 16863559. The next prime is 16863599. The reversal of 16863563 is 36536861.

It is a weak prime.

It is an emirp because it is prime and its reverse (36536861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16863563 - 2² = 16863559 is a prime.

It is not a weakly prime, because it can be changed into another prime (16863503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8431781 + 8431782.

It is an arithmetic number, because the mean of its divisors is an integer number (8431782).

Almost surely, 2^16863563 is an apocalyptic number.

16863563 is a deficient number, since it is larger than the sum of its proper divisors (1).

16863563 is an equidigital number, since it uses as much as digits as its factorization.

16863563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 38.

The square root of 16863563 is about 4106.5268780321. The cubic root of 16863563 is about 256.4384322539.

The spelling of 16863563 in words is "sixteen million, eight hundred sixty-three thousand, five hundred sixty-three".