1816849 has 2 divisors, whose sum is σ = 1816850. Its totient is φ = 1816848.

The previous prime is 1816831. The next prime is 1816853. The reversal of 1816849 is 9486181.

It is a happy number.

1816849 is nontrivially palindromic in base 6.

1816849 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1456849 + 360000 = 1207^2 + 600^2 .

It is an emirp because it is prime and its reverse (9486181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1816849 - 2⁹ = 1816337 is a prime.

It is a Chen prime.

1816849 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1816949) 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, 908424 + 908425.

It is an arithmetic number, because the mean of its divisors is an integer number (908425).

2^1816849 is an apocalyptic number.

It is an amenable number.

1816849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1816849 is an equidigital number, since it uses as much as digits as its factorization.

1816849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 37.

The square root of 1816849 is about 1347.9054121117. The cubic root of 1816849 is about 122.0224136908.

The spelling of 1816849 in words is "one million, eight hundred sixteen thousand, eight hundred forty-nine".