87480709 has 4 divisors (see below), whose sum is σ = 87513804. Its totient is φ = 87447616.

The previous prime is 87480643. The next prime is 87480721. The reversal of 87480709 is 90708478.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15824484 + 71656225 = 3978^2 + 8465^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87480709 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 (87480509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12202 + ... + 17995.

It is an arithmetic number, because the mean of its divisors is an integer number (21878451).

Almost surely, 2^87480709 is an apocalyptic number.

It is an amenable number.

87480709 is a deficient number, since it is larger than the sum of its proper divisors (33095).

87480709 is a wasteful number, since it uses less digits than its factorization.

87480709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33094.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 87480709 is about 9353.1122627711. The cubic root of 87480709 is about 443.9193726522.

The spelling of 87480709 in words is "eighty-seven million, four hundred eighty thousand, seven hundred nine".