1816133 has 4 divisors (see below), whose sum is σ = 1981248. Its totient is φ = 1651020.

The previous prime is 1816121. The next prime is 1816141. The reversal of 1816133 is 3316181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3316181 = 11 ⋅301471.

It is a cyclic number.

It is not a de Polignac number, because 1816133 - 2⁴ = 1816117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1816099 and 1816108.

It is a congruent number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82541 + ... + 82562.

It is an arithmetic number, because the mean of its divisors is an integer number (495312).

2^1816133 is an apocalyptic number.

It is an amenable number.

1816133 is a deficient number, since it is larger than the sum of its proper divisors (165115).

1816133 is a wasteful number, since it uses less digits than its factorization.

1816133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165114.

The product of its digits is 432, while the sum is 23.

The square root of 1816133 is about 1347.6397886676. The cubic root of 1816133 is about 122.0063823589.

The spelling of 1816133 in words is "one million, eight hundred sixteen thousand, one hundred thirty-three".