87081690713 has 2 divisors, whose sum is σ = 87081690714. Its totient is φ = 87081690712.

The previous prime is 87081690643. The next prime is 87081690721. The reversal of 87081690713 is 31709618078.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85432274944 + 1649415769 = 292288^2 + 40613^2 .

It is a cyclic number.

It is not a de Polignac number, because 87081690713 - 2¹⁸ = 87081428569 is a prime.

It is not a weakly prime, because it can be changed into another prime (87081690743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43540845356 + 43540845357.

It is an arithmetic number, because the mean of its divisors is an integer number (43540845357).

Almost surely, 2^87081690713 is an apocalyptic number.

It is an amenable number.

87081690713 is a deficient number, since it is larger than the sum of its proper divisors (1).

87081690713 is an equidigital number, since it uses as much as digits as its factorization.

87081690713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 50.

The spelling of 87081690713 in words is "eighty-seven billion, eighty-one million, six hundred ninety thousand, seven hundred thirteen".