87565069 has 4 divisors (see below), whose sum is σ = 87825244. Its totient is φ = 87304896.

The previous prime is 87565043. The next prime is 87565133. The reversal of 87565069 is 96056578.

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 51408900 + 36156169 = 7170^2 + 6013^2 .

It is a cyclic number.

It is not a de Polignac number, because 87565069 - 2⁷ = 87564941 is a prime.

It is a super-2 number, since 2×87565069² = 15335282617949522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87565039) 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, 129582 + ... + 130255.

It is an arithmetic number, because the mean of its divisors is an integer number (21956311).

Almost surely, 2^87565069 is an apocalyptic number.

It is an amenable number.

87565069 is a deficient number, since it is larger than the sum of its proper divisors (260175).

87565069 is a wasteful number, since it uses less digits than its factorization.

87565069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260174.

The product of its (nonzero) digits is 453600, while the sum is 46.

The square root of 87565069 is about 9357.6209049095. The cubic root of 87565069 is about 444.0620212713.

The spelling of 87565069 in words is "eighty-seven million, five hundred sixty-five thousand, sixty-nine".