87071293391 has 2 divisors, whose sum is σ = 87071293392. Its totient is φ = 87071293390.

The previous prime is 87071293373. The next prime is 87071293451. The reversal of 87071293391 is 19339217078.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87071293391 - 2⁶ = 87071293327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87071292391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43535646695 + 43535646696.

It is an arithmetic number, because the mean of its divisors is an integer number (43535646696).

Almost surely, 2^87071293391 is an apocalyptic number.

87071293391 is a deficient number, since it is larger than the sum of its proper divisors (1).

87071293391 is an equidigital number, since it uses as much as digits as its factorization.

87071293391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 571536, while the sum is 50.

The spelling of 87071293391 in words is "eighty-seven billion, seventy-one million, two hundred ninety-three thousand, three hundred ninety-one".