1808973 has 20 divisors (see below), whose sum is σ = 2822688. Its totient is φ = 1152360.

The previous prime is 1808969. The next prime is 1808977. The reversal of 1808973 is 3798081.

It is an interprime number because it is at equal distance from previous prime (1808969) and next prime (1808977).

It is not a de Polignac number, because 1808973 - 2² = 1808969 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1808977) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1378 + ... + 2348.

2^1808973 is an apocalyptic number.

It is an amenable number.

1808973 is a deficient number, since it is larger than the sum of its proper divisors (1013715).

1808973 is an equidigital number, since it uses as much as digits as its factorization.

1808973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006 (or 997 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 1808973 is about 1344.9806690061. The cubic root of 1808973 is about 121.8458368091.

The spelling of 1808973 in words is "one million, eight hundred eight thousand, nine hundred seventy-three".