87109509 has 8 divisors (see below), whose sum is σ = 122259040. Its totient is φ = 55016496.

The previous prime is 87109499. The next prime is 87109511. The reversal of 87109509 is 90590178.

It is a happy number.

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

It is not a de Polignac number, because 87109509 - 2¹⁵ = 87076741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87109549) 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, 764062 + ... + 764175.

It is an arithmetic number, because the mean of its divisors is an integer number (15282380).

Almost surely, 2^87109509 is an apocalyptic number.

It is an amenable number.

87109509 is a deficient number, since it is larger than the sum of its proper divisors (35149531).

87109509 is a wasteful number, since it uses less digits than its factorization.

87109509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528259.

The product of its (nonzero) digits is 22680, while the sum is 39.

The square root of 87109509 is about 9333.2475055578. The cubic root of 87109509 is about 443.2905997717.

The spelling of 87109509 in words is "eighty-seven million, one hundred nine thousand, five hundred nine".