8194078399 has 8 divisors (see below), whose sum is σ = 8876609840. Its totient is φ = 7563762648.

The previous prime is 8194078397. The next prime is 8194078439. The reversal of 8194078399 is 9938704918.

It is a happy number.

It is not a de Polignac number, because 8194078399 - 2¹ = 8194078397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8194078391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1862637 + ... + 1867030.

It is an arithmetic number, because the mean of its divisors is an integer number (1109576230).

Almost surely, 2^8194078399 is an apocalyptic number.

8194078399 is a deficient number, since it is larger than the sum of its proper divisors (682531441).

8194078399 is an equidigital number, since it uses as much as digits as its factorization.

8194078399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3729706 (or 3729680 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 58.

The square root of 8194078399 is about 90521.1489045516. The cubic root of 8194078399 is about 2016.0441484011.

The spelling of 8194078399 in words is "eight billion, one hundred ninety-four million, seventy-eight thousand, three hundred ninety-nine".