87276505 has 4 divisors (see below), whose sum is σ = 104731812. Its totient is φ = 69821200.

The previous prime is 87276503. The next prime is 87276529. The reversal of 87276505 is 50567278.

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 49956624 + 37319881 = 7068^2 + 6109^2 .

It is not a de Polignac number, because 87276505 - 2¹ = 87276503 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87276503) 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 3 ways as a sum of consecutive naturals, for example, 8727646 + ... + 8727655.

It is an arithmetic number, because the mean of its divisors is an integer number (26182953).

Almost surely, 2^87276505 is an apocalyptic number.

It is an amenable number.

87276505 is a deficient number, since it is larger than the sum of its proper divisors (17455307).

87276505 is a wasteful number, since it uses less digits than its factorization.

87276505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17455306.

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 87276505 is about 9342.1895185229. The cubic root of 87276505 is about 443.5736936322.

It can be divided in two parts, 872 and 76505, that added together give a palindrome (77377).

The spelling of 87276505 in words is "eighty-seven million, two hundred seventy-six thousand, five hundred five".