84647809901 has 2 divisors, whose sum is σ = 84647809902. Its totient is φ = 84647809900.

The previous prime is 84647809879. The next prime is 84647809957. The reversal of 84647809901 is 10990874648.

It is an a-pointer prime, because the next prime (84647809957) can be obtained adding 84647809901 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83989836100 + 657973801 = 289810^2 + 25651^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84647809901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84647809201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42323904950 + 42323904951.

It is an arithmetic number, because the mean of its divisors is an integer number (42323904951).

Almost surely, 2^84647809901 is an apocalyptic number.

It is an amenable number.

84647809901 is a deficient number, since it is larger than the sum of its proper divisors (1).

84647809901 is an equidigital number, since it uses as much as digits as its factorization.

84647809901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3483648, while the sum is 56.

The spelling of 84647809901 in words is "eighty-four billion, six hundred forty-seven million, eight hundred nine thousand, nine hundred one".