87855529 has 4 divisors (see below), whose sum is σ = 90885060. Its totient is φ = 84826000.

The previous prime is 87855517. The next prime is 87855539. The reversal of 87855529 is 92555878.

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 16621929 + 71233600 = 4077^2 + 8440^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87855529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87855539) 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, 1514722 + ... + 1514779.

It is an arithmetic number, because the mean of its divisors is an integer number (22721265).

Almost surely, 2^87855529 is an apocalyptic number.

It is an amenable number.

87855529 is a deficient number, since it is larger than the sum of its proper divisors (3029531).

87855529 is a wasteful number, since it uses less digits than its factorization.

87855529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3029530.

The product of its digits is 1008000, while the sum is 49.

The square root of 87855529 is about 9373.1280264381. The cubic root of 87855529 is about 444.5524752227.

The spelling of 87855529 in words is "eighty-seven million, eight hundred fifty-five thousand, five hundred twenty-nine".