87848684909 has 2 divisors, whose sum is σ = 87848684910. Its totient is φ = 87848684908.

The previous prime is 87848684873. The next prime is 87848684993. The reversal of 87848684909 is 90948684878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62505000100 + 25343684809 = 250010^2 + 159197^2 .

It is a cyclic number.

It is not a de Polignac number, because 87848684909 - 2²⁴ = 87831907693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87848684999) 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, 43924342454 + 43924342455.

It is an arithmetic number, because the mean of its divisors is an integer number (43924342455).

Almost surely, 2^87848684909 is an apocalyptic number.

It is an amenable number.

87848684909 is a deficient number, since it is larger than the sum of its proper divisors (1).

87848684909 is an equidigital number, since it uses as much as digits as its factorization.

87848684909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 222953472, while the sum is 71.

The spelling of 87848684909 in words is "eighty-seven billion, eight hundred forty-eight million, six hundred eighty-four thousand, nine hundred nine".