87582509 has 4 divisors (see below), whose sum is σ = 100094304. Its totient is φ = 75070716.

The previous prime is 87582503. The next prime is 87582541. The reversal of 87582509 is 90528578.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 87582509 - 2⁴ = 87582493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87582509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87582503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6255887 + ... + 6255900.

It is an arithmetic number, because the mean of its divisors is an integer number (25023576).

Almost surely, 2^87582509 is an apocalyptic number.

It is an amenable number.

87582509 is a deficient number, since it is larger than the sum of its proper divisors (12511795).

87582509 is a wasteful number, since it uses less digits than its factorization.

87582509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12511794.

The product of its (nonzero) digits is 201600, while the sum is 44.

The square root of 87582509 is about 9358.5527193044. The cubic root of 87582509 is about 444.0915000260.

The spelling of 87582509 in words is "eighty-seven million, five hundred eighty-two thousand, five hundred nine".