1812673 has 2 divisors, whose sum is σ = 1812674. Its totient is φ = 1812672.

The previous prime is 1812661. The next prime is 1812677. The reversal of 1812673 is 3762181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1517824 + 294849 = 1232^2 + 543^2 .

It is an emirp because it is prime and its reverse (3762181) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1812673 is a prime.

1812673 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1812677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 906336 + 906337.

It is an arithmetic number, because the mean of its divisors is an integer number (906337).

2^1812673 is an apocalyptic number.

It is an amenable number.

1812673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1812673 is an equidigital number, since it uses as much as digits as its factorization.

1812673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 28.

The square root of 1812673 is about 1346.3554508376. The cubic root of 1812673 is about 121.9288530796.

It can be divided in two parts, 1812 and 673, that added together give a triangular number (2485 = T₇₀).

The spelling of 1812673 in words is "one million, eight hundred twelve thousand, six hundred seventy-three".