1984813 has 2 divisors, whose sum is σ = 1984814. Its totient is φ = 1984812.

The previous prime is 1984799. The next prime is 1984817. The reversal of 1984813 is 3184891.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1646089 + 338724 = 1283^2 + 582^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1984813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1984817) 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, 992406 + 992407.

It is an arithmetic number, because the mean of its divisors is an integer number (992407).

2^1984813 is an apocalyptic number.

It is an amenable number.

1984813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1984813 is an equidigital number, since it uses as much as digits as its factorization.

1984813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 34.

The square root of 1984813 is about 1408.8339149808. The cubic root of 1984813 is about 125.6723873436.

The spelling of 1984813 in words is "one million, nine hundred eighty-four thousand, eight hundred thirteen".