87168009 has 16 divisors (see below), whose sum is σ = 121834944. Its totient is φ = 55372800.

The previous prime is 87167981. The next prime is 87168023. The reversal of 87168009 is 90086178.

It is not a de Polignac number, because 87168009 - 2¹¹ = 87165961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87168089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2952 + ... + 13529.

It is an arithmetic number, because the mean of its divisors is an integer number (7614684).

Almost surely, 2^87168009 is an apocalyptic number.

It is an amenable number.

87168009 is a deficient number, since it is larger than the sum of its proper divisors (34666935).

87168009 is a wasteful number, since it uses less digits than its factorization.

87168009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16568.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 87168009 is about 9336.3809369584. The cubic root of 87168009 is about 443.3898108964.

The spelling of 87168009 in words is "eighty-seven million, one hundred sixty-eight thousand, nine".