87240009 has 8 divisors (see below), whose sum is σ = 116963392. Its totient is φ = 57838320.

The previous prime is 87239987. The next prime is 87240011. The reversal of 87240009 is 90004278.

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

It is not a de Polignac number, because 87240009 - 2⁸ = 87239753 is a prime.

It is a super-2 number, since 2×87240009² = 15221638340640162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87240079) 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, 79789 + ... + 80874.

It is an arithmetic number, because the mean of its divisors is an integer number (14620424).

Almost surely, 2^87240009 is an apocalyptic number.

It is an amenable number.

87240009 is a deficient number, since it is larger than the sum of its proper divisors (29723383).

87240009 is a wasteful number, since it uses less digits than its factorization.

87240009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160847.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 87240009 is about 9340.2360248550. The cubic root of 87240009 is about 443.5118559797.

The spelling of 87240009 in words is "eighty-seven million, two hundred forty thousand, nine".