87705143893 has 2 divisors, whose sum is σ = 87705143894. Its totient is φ = 87705143892.

The previous prime is 87705143837. The next prime is 87705143927. The reversal of 87705143893 is 39834150778.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62583527889 + 25121616004 = 250167^2 + 158498^2 .

It is a cyclic number.

It is not a de Polignac number, because 87705143893 - 2²⁵ = 87671589461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87705143833) 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, 43852571946 + 43852571947.

It is an arithmetic number, because the mean of its divisors is an integer number (43852571947).

Almost surely, 2^87705143893 is an apocalyptic number.

It is an amenable number.

87705143893 is a deficient number, since it is larger than the sum of its proper divisors (1).

87705143893 is an equidigital number, since it uses as much as digits as its factorization.

87705143893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 87705143893 in words is "eighty-seven billion, seven hundred five million, one hundred forty-three thousand, eight hundred ninety-three".