87445209 has 8 divisors (see below), whose sum is σ = 117796000. Its totient is φ = 57695616.

The previous prime is 87445181. The next prime is 87445217. The reversal of 87445209 is 90254478.

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

It is not a de Polignac number, because 87445209 - 2⁹ = 87444697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87445219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149959 + ... + 150540.

It is an arithmetic number, because the mean of its divisors is an integer number (14724500).

Almost surely, 2^87445209 is an apocalyptic number.

It is an amenable number.

87445209 is a deficient number, since it is larger than the sum of its proper divisors (30350791).

87445209 is a wasteful number, since it uses less digits than its factorization.

87445209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300599.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 87445209 is about 9351.2143061744. The cubic root of 87445209 is about 443.8593164787.

The spelling of 87445209 in words is "eighty-seven million, four hundred forty-five thousand, two hundred nine".