87232509 has 48 divisors (see below), whose sum is σ = 158750592. Its totient is φ = 44924544.

The previous prime is 87232433. The next prime is 87232567. The reversal of 87232509 is 90523278.

It is a happy number.

It is not a de Polignac number, because 87232509 - 2⁹ = 87231997 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87236509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33979 + ... + 36455.

It is an arithmetic number, because the mean of its divisors is an integer number (3307304).

Almost surely, 2^87232509 is an apocalyptic number.

It is an amenable number.

87232509 is a deficient number, since it is larger than the sum of its proper divisors (71518083).

87232509 is a wasteful number, since it uses less digits than its factorization.

87232509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2546 (or 2543 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 87232509 is about 9339.8345274421. The cubic root of 87232509 is about 443.4991460840.

The spelling of 87232509 in words is "eighty-seven million, two hundred thirty-two thousand, five hundred nine".