16813963 has 2 divisors, whose sum is σ = 16813964. Its totient is φ = 16813962.

The previous prime is 16813961. The next prime is 16813987. The reversal of 16813963 is 36931861.

It is a weak prime.

It is an emirp because it is prime and its reverse (36931861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16813963 - 2¹ = 16813961 is a prime.

Together with 16813961, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16813961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8406981 + 8406982.

It is an arithmetic number, because the mean of its divisors is an integer number (8406982).

Almost surely, 2^16813963 is an apocalyptic number.

16813963 is a deficient number, since it is larger than the sum of its proper divisors (1).

16813963 is an equidigital number, since it uses as much as digits as its factorization.

16813963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 37.

The square root of 16813963 is about 4100.4832642019. The cubic root of 16813963 is about 256.1867686143.

The spelling of 16813963 in words is "sixteen million, eight hundred thirteen thousand, nine hundred sixty-three".