87565911 has 16 divisors (see below), whose sum is σ = 120092544. Its totient is φ = 56729504.

The previous prime is 87565901. The next prime is 87565921. The reversal of 87565911 is 11956578.

It is an interprime number because it is at equal distance from previous prime (87565901) and next prime (87565921).

It is not a de Polignac number, because 87565911 - 2⁷ = 87565783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87565901) by changing a digit.

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, 14440 + ... + 19586.

It is an arithmetic number, because the mean of its divisors is an integer number (7505784).

Almost surely, 2^87565911 is an apocalyptic number.

87565911 is a deficient number, since it is larger than the sum of its proper divisors (32526633).

87565911 is a wasteful number, since it uses less digits than its factorization.

87565911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5310.

The product of its digits is 75600, while the sum is 42.

The square root of 87565911 is about 9357.6658948693. The cubic root of 87565911 is about 444.0634445901.

The spelling of 87565911 in words is "eighty-seven million, five hundred sixty-five thousand, nine hundred eleven".