1838813 has 2 divisors, whose sum is σ = 1838814. Its totient is φ = 1838812.

The previous prime is 1838807. The next prime is 1838819. The reversal of 1838813 is 3188381.

It is a balanced prime because it is at equal distance from previous prime (1838807) and next prime (1838819).

It can be written as a sum of positive squares in only one way, i.e., 1545049 + 293764 = 1243^2 + 542^2 .

It is a cyclic number.

It is not a de Polignac number, because 1838813 - 2¹⁰ = 1837789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1838813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1838819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 919406 + 919407.

It is an arithmetic number, because the mean of its divisors is an integer number (919407).

2^1838813 is an apocalyptic number.

It is an amenable number.

1838813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1838813 is an equidigital number, since it uses as much as digits as its factorization.

1838813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 32.

The square root of 1838813 is about 1356.0283920331. The cubic root of 1838813 is about 122.5121576161.

The spelling of 1838813 in words is "one million, eight hundred thirty-eight thousand, eight hundred thirteen".