87105224117 has 2 divisors, whose sum is σ = 87105224118. Its totient is φ = 87105224116.

The previous prime is 87105224099. The next prime is 87105224147. The reversal of 87105224117 is 71142250178.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85820288401 + 1284935716 = 292951^2 + 35846^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87105224117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87105224147) 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, 43552612058 + 43552612059.

It is an arithmetic number, because the mean of its divisors is an integer number (43552612059).

Almost surely, 2^87105224117 is an apocalyptic number.

It is an amenable number.

87105224117 is a deficient number, since it is larger than the sum of its proper divisors (1).

87105224117 is an equidigital number, since it uses as much as digits as its factorization.

87105224117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31360, while the sum is 38.

The spelling of 87105224117 in words is "eighty-seven billion, one hundred five million, two hundred twenty-four thousand, one hundred seventeen".