1812923 has 16 divisors (see below), whose sum is σ = 2238720. Its totient is φ = 1433376.

The previous prime is 1812917. The next prime is 1812947. The reversal of 1812923 is 3292181.

It is not a de Polignac number, because 1812923 - 2⁴ = 1812907 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1812892 and 1812901.

It is not an unprimeable number, because it can be changed into a prime (1812983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5561 + ... + 5877.

It is an arithmetic number, because the mean of its divisors is an integer number (139920).

2^1812923 is an apocalyptic number.

1812923 is a deficient number, since it is larger than the sum of its proper divisors (425797).

1812923 is a wasteful number, since it uses less digits than its factorization.

1812923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386.

The product of its digits is 864, while the sum is 26.

The square root of 1812923 is about 1346.4482908749. The cubic root of 1812923 is about 121.9344582112.

The spelling of 1812923 in words is "one million, eight hundred twelve thousand, nine hundred twenty-three".