87527721 has 8 divisors (see below), whose sum is σ = 116883360. Its totient is φ = 58261952.

The previous prime is 87527717. The next prime is 87527729. The reversal of 87527721 is 12772578.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87527721 - 2² = 87527717 is a prime.

It is a super-2 number, since 2×87527721² = 15322203886907682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87527721.

It is not an unprimeable number, because it can be changed into a prime (87527729) 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 7 ways as a sum of consecutive naturals, for example, 20160 + ... + 24113.

It is an arithmetic number, because the mean of its divisors is an integer number (14610420).

Almost surely, 2^87527721 is an apocalyptic number.

It is an amenable number.

87527721 is a deficient number, since it is larger than the sum of its proper divisors (29355639).

87527721 is a wasteful number, since it uses less digits than its factorization.

87527721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44935.

The product of its digits is 54880, while the sum is 39.

The square root of 87527721 is about 9355.6250993720. The cubic root of 87527721 is about 443.9988789437.

The spelling of 87527721 in words is "eighty-seven million, five hundred twenty-seven thousand, seven hundred twenty-one".