87673209 has 16 divisors (see below), whose sum is σ = 126235200. Its totient is φ = 53804736.

The previous prime is 87673207. The next prime is 87673213. The reversal of 87673209 is 90237678.

It is not a de Polignac number, because 87673209 - 2¹ = 87673207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87673207) 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, 12282 + ... + 18060.

It is an arithmetic number, because the mean of its divisors is an integer number (7889700).

Almost surely, 2^87673209 is an apocalyptic number.

It is an amenable number.

87673209 is a deficient number, since it is larger than the sum of its proper divisors (38561991).

87673209 is a wasteful number, since it uses less digits than its factorization.

87673209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6184.

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 87673209 is about 9363.3973001256. The cubic root of 87673209 is about 444.2447467691.

The spelling of 87673209 in words is "eighty-seven million, six hundred seventy-three thousand, two hundred nine".