1813223 has 2 divisors, whose sum is σ = 1813224. Its totient is φ = 1813222.

The previous prime is 1813219. The next prime is 1813277. The reversal of 1813223 is 3223181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1813223 - 2² = 1813219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1813195 and 1813204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1813523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 906611 + 906612.

It is an arithmetic number, because the mean of its divisors is an integer number (906612).

2^1813223 is an apocalyptic number.

1813223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1813223 is an equidigital number, since it uses as much as digits as its factorization.

1813223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 20.

The square root of 1813223 is about 1346.5596904705. The cubic root of 1813223 is about 121.9411836889.

The spelling of 1813223 in words is "one million, eight hundred thirteen thousand, two hundred twenty-three".