87368043517 has 2 divisors, whose sum is σ = 87368043518. Its totient is φ = 87368043516.

The previous prime is 87368043487. The next prime is 87368043563. The reversal of 87368043517 is 71534086378.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44330881401 + 43037162116 = 210549^2 + 207454^2 .

It is a cyclic number.

It is not a de Polignac number, because 87368043517 - 2³¹ = 85220559869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87368043017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43684021758 + 43684021759.

It is an arithmetic number, because the mean of its divisors is an integer number (43684021759).

Almost surely, 2^87368043517 is an apocalyptic number.

It is an amenable number.

87368043517 is a deficient number, since it is larger than the sum of its proper divisors (1).

87368043517 is an equidigital number, since it uses as much as digits as its factorization.

87368043517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 87368043517 in words is "eighty-seven billion, three hundred sixty-eight million, forty-three thousand, five hundred seventeen".