87205529 has 4 divisors (see below), whose sum is σ = 92335284. Its totient is φ = 82075776.

The previous prime is 87205507. The next prime is 87205553. The reversal of 87205529 is 92550278.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38875225 + 48330304 = 6235^2 + 6952^2 .

It is a cyclic number.

It is not a de Polignac number, because 87205529 - 2¹⁶ = 87139993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87205492 and 87205501.

It is not an unprimeable number, because it can be changed into a prime (87205579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2564852 + ... + 2564885.

It is an arithmetic number, because the mean of its divisors is an integer number (23083821).

Almost surely, 2^87205529 is an apocalyptic number.

It is an amenable number.

87205529 is a deficient number, since it is larger than the sum of its proper divisors (5129755).

87205529 is a wasteful number, since it uses less digits than its factorization.

87205529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5129754.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 87205529 is about 9338.3900646739. The cubic root of 87205529 is about 443.4534183276.

The spelling of 87205529 in words is "eighty-seven million, two hundred five thousand, five hundred twenty-nine".