16855963 has 2 divisors, whose sum is σ = 16855964. Its totient is φ = 16855962.

The previous prime is 16855921. The next prime is 16855967. The reversal of 16855963 is 36955861.

It is a strong prime.

It is an emirp because it is prime and its reverse (36955861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16855963 - 2¹³ = 16847771 is a prime.

It is not a weakly prime, because it can be changed into another prime (16855967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8427981 + 8427982.

It is an arithmetic number, because the mean of its divisors is an integer number (8427982).

Almost surely, 2^16855963 is an apocalyptic number.

16855963 is a deficient number, since it is larger than the sum of its proper divisors (1).

16855963 is an equidigital number, since it uses as much as digits as its factorization.

16855963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 43.

The square root of 16855963 is about 4105.6014175757. The cubic root of 16855963 is about 256.3999029321.

The spelling of 16855963 in words is "sixteen million, eight hundred fifty-five thousand, nine hundred sixty-three".