87328209 has 16 divisors (see below), whose sum is σ = 122757120. Its totient is φ = 55139280.

The previous prime is 87328207. The next prime is 87328211. The reversal of 87328209 is 90282378.

It is an interprime number because it is at equal distance from previous prime (87328207) and next prime (87328211).

It is not a de Polignac number, because 87328209 - 2¹ = 87328207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87328207) 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, 5619 + ... + 14360.

It is an arithmetic number, because the mean of its divisors is an integer number (7672320).

Almost surely, 2^87328209 is an apocalyptic number.

It is an amenable number.

87328209 is a deficient number, since it is larger than the sum of its proper divisors (35428911).

87328209 is a wasteful number, since it uses less digits than its factorization.

87328209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20060.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 87328209 is about 9344.9563401869. The cubic root of 87328209 is about 443.6612697285.

The spelling of 87328209 in words is "eighty-seven million, three hundred twenty-eight thousand, two hundred nine".