83087217952891 has 2 divisors, whose sum is σ = 83087217952892. Its totient is φ = 83087217952890.

The previous prime is 83087217952841. The next prime is 83087217952897. The reversal of 83087217952891 is 19825971278038.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83087217952891 - 2¹⁷ = 83087217821819 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83087217952891.

It is not a weakly prime, because it can be changed into another prime (83087217952897) 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, 41543608976445 + 41543608976446.

It is an arithmetic number, because the mean of its divisors is an integer number (41543608976446).

Almost surely, 2^{83087217952891} is an apocalyptic number.

83087217952891 is a deficient number, since it is larger than the sum of its proper divisors (1).

83087217952891 is an equidigital number, since it uses as much as digits as its factorization.

83087217952891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 121927680, while the sum is 70.

The spelling of 83087217952891 in words is "eighty-three trillion, eighty-seven billion, two hundred seventeen million, nine hundred fifty-two thousand, eight hundred ninety-one".