87205054493 has 2 divisors, whose sum is σ = 87205054494. Its totient is φ = 87205054492.

The previous prime is 87205054457. The next prime is 87205054501. The reversal of 87205054493 is 39445050278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74396926564 + 12808127929 = 272758^2 + 113173^2 .

It is a cyclic number.

It is not a de Polignac number, because 87205054493 - 2⁶ = 87205054429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87205054793) 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, 43602527246 + 43602527247.

It is an arithmetic number, because the mean of its divisors is an integer number (43602527247).

Almost surely, 2^87205054493 is an apocalyptic number.

It is an amenable number.

87205054493 is a deficient number, since it is larger than the sum of its proper divisors (1).

87205054493 is an equidigital number, since it uses as much as digits as its factorization.

87205054493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1209600, while the sum is 47.

The spelling of 87205054493 in words is "eighty-seven billion, two hundred five million, fifty-four thousand, four hundred ninety-three".