87709505 has 16 divisors (see below), whose sum is σ = 114416064. Its totient is φ = 64159680.

The previous prime is 87709493. The next prime is 87709553. The reversal of 87709505 is 50590778.

It is a happy number.

It is not a de Polignac number, because 87709505 - 2⁶ = 87709441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 650 + ... + 13260.

It is an arithmetic number, because the mean of its divisors is an integer number (7151004).

Almost surely, 2^87709505 is an apocalyptic number.

It is an amenable number.

87709505 is a deficient number, since it is larger than the sum of its proper divisors (26706559).

87709505 is a wasteful number, since it uses less digits than its factorization.

87709505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12736.

The product of its (nonzero) digits is 88200, while the sum is 41.

The square root of 87709505 is about 9365.3352849751. The cubic root of 87709505 is about 444.3060428895.

The spelling of 87709505 in words is "eighty-seven million, seven hundred nine thousand, five hundred five".