8084400091 has 2 divisors, whose sum is σ = 8084400092. Its totient is φ = 8084400090.

The previous prime is 8084400061. The next prime is 8084400127. The reversal of 8084400091 is 1900044808.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8084400091 - 2⁹ = 8084399579 is a prime.

It is not a weakly prime, because it can be changed into another prime (8084400061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4042200045 + 4042200046.

It is an arithmetic number, because the mean of its divisors is an integer number (4042200046).

Almost surely, 2^8084400091 is an apocalyptic number.

8084400091 is a deficient number, since it is larger than the sum of its proper divisors (1).

8084400091 is an equidigital number, since it uses as much as digits as its factorization.

8084400091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 8084400091 is about 89913.2920707500. The cubic root of 8084400091 is about 2007.0087509312.

Adding to 8084400091 its reverse (1900044808), we get a palindrome (9984444899).

The spelling of 8084400091 in words is "eight billion, eighty-four million, four hundred thousand, ninety-one".