87555249 has 20 divisors (see below), whose sum is σ = 137678640. Its totient is φ = 55297080.

The previous prime is 87555241. The next prime is 87555257. The reversal of 87555249 is 94255578.

It is an interprime number because it is at equal distance from previous prime (87555241) and next prime (87555257).

It is not a de Polignac number, because 87555249 - 2³ = 87555241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87555241) 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 19 ways as a sum of consecutive naturals, for example, 26907 + ... + 29984.

It is an arithmetic number, because the mean of its divisors is an integer number (6883932).

Almost surely, 2^87555249 is an apocalyptic number.

It is an amenable number.

87555249 is a deficient number, since it is larger than the sum of its proper divisors (50123391).

87555249 is a wasteful number, since it uses less digits than its factorization.

87555249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56922 (or 56913 counting only the distinct ones).

The product of its digits is 504000, while the sum is 45.

The square root of 87555249 is about 9357.0961841802. The cubic root of 87555249 is about 444.0454208464.

The spelling of 87555249 in words is "eighty-seven million, five hundred fifty-five thousand, two hundred forty-nine".