87915567 has 4 divisors (see below), whose sum is σ = 117220760. Its totient is φ = 58610376.

The previous prime is 87915557. The next prime is 87915571. The reversal of 87915567 is 76551978.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 87915567 - 2²² = 83721263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87915557) 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, 14652592 + ... + 14652597.

It is an arithmetic number, because the mean of its divisors is an integer number (29305190).

Almost surely, 2^87915567 is an apocalyptic number.

87915567 is a deficient number, since it is larger than the sum of its proper divisors (29305193).

87915567 is a wasteful number, since it uses less digits than its factorization.

87915567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29305192.

The product of its digits is 529200, while the sum is 48.

The square root of 87915567 is about 9376.3301456380. The cubic root of 87915567 is about 444.6537170545.

The spelling of 87915567 in words is "eighty-seven million, nine hundred fifteen thousand, five hundred sixty-seven".