1808923 has 2 divisors, whose sum is σ = 1808924. Its totient is φ = 1808922.

The previous prime is 1808921. The next prime is 1808951. The reversal of 1808923 is 3298081.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1808923 - 2¹ = 1808921 is a prime.

Together with 1808921, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1808921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 904461 + 904462.

It is an arithmetic number, because the mean of its divisors is an integer number (904462).

2^1808923 is an apocalyptic number.

1808923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1808923 is an equidigital number, since it uses as much as digits as its factorization.

1808923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 1808923 is about 1344.9620812499. The cubic root of 1808923 is about 121.8447141928.

The spelling of 1808923 in words is "one million, eight hundred eight thousand, nine hundred twenty-three".