87844009 has 8 divisors (see below), whose sum is σ = 96056352. Its totient is φ = 79669440.

The previous prime is 87844007. The next prime is 87844027. The reversal of 87844009 is 90044878.

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 87844009 - 2¹ = 87844007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87844007) 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, 4459 + ... + 13984.

It is an arithmetic number, because the mean of its divisors is an integer number (12007044).

Almost surely, 2^87844009 is an apocalyptic number.

It is an amenable number.

87844009 is a deficient number, since it is larger than the sum of its proper divisors (8212343).

87844009 is a wasteful number, since it uses less digits than its factorization.

87844009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18887.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 87844009 is about 9372.5134835859. The cubic root of 87844009 is about 444.5330438205.

The spelling of 87844009 in words is "eighty-seven million, eight hundred forty-four thousand, nine".