84884004509 has 2 divisors, whose sum is σ = 84884004510. Its totient is φ = 84884004508.

The previous prime is 84884004437. The next prime is 84884004511. The reversal of 84884004509 is 90540048848.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74868998884 + 10015005625 = 273622^2 + 100075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84884004509 is a prime.

Together with 84884004511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84884004109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42442002254 + 42442002255.

It is an arithmetic number, because the mean of its divisors is an integer number (42442002255).

Almost surely, 2^84884004509 is an apocalyptic number.

It is an amenable number.

84884004509 is a deficient number, since it is larger than the sum of its proper divisors (1).

84884004509 is an equidigital number, since it uses as much as digits as its factorization.

84884004509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1474560, while the sum is 50.

The spelling of 84884004509 in words is "eighty-four billion, eight hundred eighty-four million, four thousand, five hundred nine".