87564601 has 4 divisors (see below), whose sum is σ = 90584100. Its totient is φ = 84545104.

The previous prime is 87564599. The next prime is 87564629. The reversal of 87564601 is 10646578.

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 69288976 + 18275625 = 8324^2 + 4275^2 .

It is a cyclic number.

It is not a de Polignac number, because 87564601 - 2¹ = 87564599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87564661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1509706 + ... + 1509763.

It is an arithmetic number, because the mean of its divisors is an integer number (22646025).

Almost surely, 2^87564601 is an apocalyptic number.

It is an amenable number.

87564601 is a deficient number, since it is larger than the sum of its proper divisors (3019499).

87564601 is a wasteful number, since it uses less digits than its factorization.

87564601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3019498.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 87564601 is about 9357.5958985201. The cubic root of 87564601 is about 444.0612301591.

The spelling of 87564601 in words is "eighty-seven million, five hundred sixty-four thousand, six hundred one".