84109836947 has 2 divisors, whose sum is σ = 84109836948. Its totient is φ = 84109836946.

The previous prime is 84109836929. The next prime is 84109836997. The reversal of 84109836947 is 74963890148.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84109836947 - 2²⁶ = 84042728083 is a prime.

It is not a weakly prime, because it can be changed into another prime (84109836997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42054918473 + 42054918474.

It is an arithmetic number, because the mean of its divisors is an integer number (42054918474).

Almost surely, 2^84109836947 is an apocalyptic number.

84109836947 is a deficient number, since it is larger than the sum of its proper divisors (1).

84109836947 is an equidigital number, since it uses as much as digits as its factorization.

84109836947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10450944, while the sum is 59.

The spelling of 84109836947 in words is "eighty-four billion, one hundred nine million, eight hundred thirty-six thousand, nine hundred forty-seven".