84109836247 has 2 divisors, whose sum is σ = 84109836248. Its totient is φ = 84109836246.

The previous prime is 84109836221. The next prime is 84109836271. The reversal of 84109836247 is 74263890148.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84109836247 - 2¹⁹ = 84109311959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84109836194 and 84109836203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84109836947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42054918123 + 42054918124.

It is an arithmetic number, because the mean of its divisors is an integer number (42054918124).

Almost surely, 2^84109836247 is an apocalyptic number.

84109836247 is a deficient number, since it is larger than the sum of its proper divisors (1).

84109836247 is an equidigital number, since it uses as much as digits as its factorization.

84109836247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 84109836247 in words is "eighty-four billion, one hundred nine million, eight hundred thirty-six thousand, two hundred forty-seven".