9782813 has 2 divisors, whose sum is σ = 9782814. Its totient is φ = 9782812.

The previous prime is 9782783. The next prime is 9782821. The reversal of 9782813 is 3182879.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9498724 + 284089 = 3082^2 + 533^2 .

It is a cyclic number.

It is not a de Polignac number, because 9782813 - 2¹⁴ = 9766429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9782833) 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, 4891406 + 4891407.

It is an arithmetic number, because the mean of its divisors is an integer number (4891407).

Almost surely, 2^9782813 is an apocalyptic number.

It is an amenable number.

9782813 is a deficient number, since it is larger than the sum of its proper divisors (1).

9782813 is an equidigital number, since it uses as much as digits as its factorization.

9782813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 38.

The square root of 9782813 is about 3127.7488709933. The cubic root of 9782813 is about 213.8723217192.

The spelling of 9782813 in words is "nine million, seven hundred eighty-two thousand, eight hundred thirteen".