1818923 has 2 divisors, whose sum is σ = 1818924. Its totient is φ = 1818922.

The previous prime is 1818919. The next prime is 1818931. The reversal of 1818923 is 3298181.

It is a weak prime.

It is an emirp because it is prime and its reverse (3298181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1818923 - 2² = 1818919 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1818923.

It is not a weakly prime, because it can be changed into another prime (1818023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 909461 + 909462.

It is an arithmetic number, because the mean of its divisors is an integer number (909462).

2^1818923 is an apocalyptic number.

1818923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1818923 is an equidigital number, since it uses as much as digits as its factorization.

1818923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 32.

The square root of 1818923 is about 1348.6745344967. The cubic root of 1818923 is about 122.0688270597.

The spelling of 1818923 in words is "one million, eight hundred eighteen thousand, nine hundred twenty-three".