87555751 has 4 divisors (see below), whose sum is σ = 87579072. Its totient is φ = 87532432.

The previous prime is 87555707. The next prime is 87555757. The reversal of 87555751 is 15755578.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 87555751 - 2¹⁹ = 87031463 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87555698 and 87555707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87555757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4606 + ... + 14011.

It is an arithmetic number, because the mean of its divisors is an integer number (21894768).

Almost surely, 2^87555751 is an apocalyptic number.

87555751 is a deficient number, since it is larger than the sum of its proper divisors (23321).

87555751 is a wasteful number, since it uses less digits than its factorization.

87555751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23320.

The product of its digits is 245000, while the sum is 43.

The square root of 87555751 is about 9357.1230087030. The cubic root of 87555751 is about 444.0462694929.

The spelling of 87555751 in words is "eighty-seven million, five hundred fifty-five thousand, seven hundred fifty-one".