87535520693 has 2 divisors, whose sum is σ = 87535520694. Its totient is φ = 87535520692.

The previous prime is 87535520629. The next prime is 87535520707. The reversal of 87535520693 is 39602553578.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65148478564 + 22387042129 = 255242^2 + 149623^2 .

It is a cyclic number.

It is not a de Polignac number, because 87535520693 - 2⁶ = 87535520629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87535520993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43767760346 + 43767760347.

It is an arithmetic number, because the mean of its divisors is an integer number (43767760347).

Almost surely, 2^87535520693 is an apocalyptic number.

It is an amenable number.

87535520693 is a deficient number, since it is larger than the sum of its proper divisors (1).

87535520693 is an equidigital number, since it uses as much as digits as its factorization.

87535520693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804000, while the sum is 53.

The spelling of 87535520693 in words is "eighty-seven billion, five hundred thirty-five million, five hundred twenty thousand, six hundred ninety-three".