87792781871 has 2 divisors, whose sum is σ = 87792781872. Its totient is φ = 87792781870.

The previous prime is 87792781847. The next prime is 87792781877. The reversal of 87792781871 is 17818729778.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87792781871 - 2⁶ = 87792781807 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 87792781798 and 87792781807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87792781877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43896390935 + 43896390936.

It is an arithmetic number, because the mean of its divisors is an integer number (43896390936).

Almost surely, 2^87792781871 is an apocalyptic number.

87792781871 is a deficient number, since it is larger than the sum of its proper divisors (1).

87792781871 is an equidigital number, since it uses as much as digits as its factorization.

87792781871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22127616, while the sum is 65.

The spelling of 87792781871 in words is "eighty-seven billion, seven hundred ninety-two million, seven hundred eighty-one thousand, eight hundred seventy-one".