87057505 has 4 divisors (see below), whose sum is σ = 104469012. Its totient is φ = 69646000.

The previous prime is 87057479. The next prime is 87057511. The reversal of 87057505 is 50575078.

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 19044496 + 68013009 = 4364^2 + 8247^2 .

It is not a de Polignac number, because 87057505 - 2¹¹ = 87055457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8705746 + ... + 8705755.

It is an arithmetic number, because the mean of its divisors is an integer number (26117253).

Almost surely, 2^87057505 is an apocalyptic number.

It is an amenable number.

87057505 is a deficient number, since it is larger than the sum of its proper divisors (17411507).

87057505 is a wasteful number, since it uses less digits than its factorization.

87057505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17411506.

The product of its (nonzero) digits is 49000, while the sum is 37.

The square root of 87057505 is about 9330.4611354423. The cubic root of 87057505 is about 443.2023680213.

The spelling of 87057505 in words is "eighty-seven million, fifty-seven thousand, five hundred five".