87750081 has 16 divisors (see below), whose sum is σ = 132768000. Its totient is φ = 57254544.

The previous prime is 87750079. The next prime is 87750133. The reversal of 87750081 is 18005778.

87750081 is a `hidden beast` number, since 8 + 77 + 500 + 81 = 666.

It is not a de Polignac number, because 87750081 - 2¹ = 87750079 is a prime.

It is a super-2 number, since 2×87750081² = 15400153431013122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87750001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33306 + ... + 35843.

It is an arithmetic number, because the mean of its divisors is an integer number (8298000).

Almost surely, 2^87750081 is an apocalyptic number.

It is an amenable number.

87750081 is a deficient number, since it is larger than the sum of its proper divisors (45017919).

87750081 is a wasteful number, since it uses less digits than its factorization.

87750081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69205 (or 69199 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 36.

The square root of 87750081 is about 9367.5013210568. The cubic root of 87750081 is about 444.3745469917.

The spelling of 87750081 in words is "eighty-seven million, seven hundred fifty thousand, eighty-one".