1808873 has 4 divisors (see below), whose sum is σ = 1973328. Its totient is φ = 1644420.

The previous prime is 1808869. The next prime is 1808887. The reversal of 1808873 is 3788081.

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: 3788081 = 11 ⋅344371.

It is a cyclic number.

It is not a de Polignac number, because 1808873 - 2² = 1808869 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1808803) 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, 82211 + ... + 82232.

It is an arithmetic number, because the mean of its divisors is an integer number (493332).

2^1808873 is an apocalyptic number.

It is an amenable number.

1808873 is a deficient number, since it is larger than the sum of its proper divisors (164455).

1808873 is a wasteful number, since it uses less digits than its factorization.

1808873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164454.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 1808873 is about 1344.9434932368. The cubic root of 1808873 is about 121.8435915558.

The spelling of 1808873 in words is "one million, eight hundred eight thousand, eight hundred seventy-three".