8394998813 has 2 divisors, whose sum is σ = 8394998814. Its totient is φ = 8394998812.

The previous prime is 8394998767. The next prime is 8394998839. The reversal of 8394998813 is 3188994938.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7268926564 + 1126072249 = 85258^2 + 33557^2 .

It is a cyclic number.

It is not a de Polignac number, because 8394998813 - 2¹⁰ = 8394997789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8394998863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4197499406 + 4197499407.

It is an arithmetic number, because the mean of its divisors is an integer number (4197499407).

Almost surely, 2^8394998813 is an apocalyptic number.

It is an amenable number.

8394998813 is a deficient number, since it is larger than the sum of its proper divisors (1).

8394998813 is an equidigital number, since it uses as much as digits as its factorization.

8394998813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13436928, while the sum is 62.

The square root of 8394998813 is about 91624.2261249720. The cubic root of 8394998813 is about 2032.3892059004.

The spelling of 8394998813 in words is "eight billion, three hundred ninety-four million, nine hundred ninety-eight thousand, eight hundred thirteen".