87304509 has 6 divisors (see below), whose sum is σ = 126106526. Its totient is φ = 58203000.

The previous prime is 87304507. The next prime is 87304513. The reversal of 87304509 is 90540378.

It can be written as a sum of positive squares in only one way, i.e., 78322500 + 8982009 = 8850^2 + 2997^2 .

It is not a de Polignac number, because 87304509 - 2¹ = 87304507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87304507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4850242 + ... + 4850259.

Almost surely, 2^87304509 is an apocalyptic number.

It is an amenable number.

87304509 is a deficient number, since it is larger than the sum of its proper divisors (38802017).

87304509 is a wasteful number, since it uses less digits than its factorization.

87304509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9700507 (or 9700504 counting only the distinct ones).

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

The square root of 87304509 is about 9343.6881904310. The cubic root of 87304509 is about 443.6211310243.

The spelling of 87304509 in words is "eighty-seven million, three hundred four thousand, five hundred nine".