87580289 has 4 divisors (see below), whose sum is σ = 88064340. Its totient is φ = 87096240.

The previous prime is 87580279. The next prime is 87580303. The reversal of 87580289 is 98208578.

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 25170289 + 62410000 = 5017^2 + 7900^2 .

It is a cyclic number.

It is not a de Polignac number, because 87580289 - 2⁸ = 87580033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87580279) 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, 241754 + ... + 242115.

It is an arithmetic number, because the mean of its divisors is an integer number (22016085).

Almost surely, 2^87580289 is an apocalyptic number.

It is an amenable number.

87580289 is a deficient number, since it is larger than the sum of its proper divisors (484051).

87580289 is a wasteful number, since it uses less digits than its factorization.

87580289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484050.

The product of its (nonzero) digits is 322560, while the sum is 47.

The square root of 87580289 is about 9358.4341104696. The cubic root of 87580289 is about 444.0877477872.

The spelling of 87580289 in words is "eighty-seven million, five hundred eighty thousand, two hundred eighty-nine".