1816163 has 4 divisors (see below), whose sum is σ = 1820520. Its totient is φ = 1811808.

The previous prime is 1816159. The next prime is 1816187. The reversal of 1816163 is 3616181.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1816163 - 2² = 1816159 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1816193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1478 + ... + 2411.

It is an arithmetic number, because the mean of its divisors is an integer number (455130).

2^1816163 is an apocalyptic number.

1816163 is a deficient number, since it is larger than the sum of its proper divisors (4357).

1816163 is an equidigital number, since it uses as much as digits as its factorization.

1816163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4356.

The product of its digits is 864, while the sum is 26.

The square root of 1816163 is about 1347.6509191924. The cubic root of 1816163 is about 122.0070541473.

The spelling of 1816163 in words is "one million, eight hundred sixteen thousand, one hundred sixty-three".