87688791 has 32 divisors (see below), whose sum is σ = 134447040. Its totient is φ = 56448000.

The previous prime is 87688789. The next prime is 87688807. The reversal of 87688791 is 19788678.

It is not a de Polignac number, because 87688791 - 2¹ = 87688789 is a prime.

Its product of digits (1354752) is a multiple of the sum of its prime factors (864).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87688751) 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 31 ways as a sum of consecutive naturals, for example, 124741 + ... + 125441.

It is an arithmetic number, because the mean of its divisors is an integer number (4201470).

Almost surely, 2^87688791 is an apocalyptic number.

87688791 is a deficient number, since it is larger than the sum of its proper divisors (46758249).

87688791 is a wasteful number, since it uses less digits than its factorization.

87688791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864 (or 858 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 54.

The square root of 87688791 is about 9364.2293329457. The cubic root of 87688791 is about 444.2710634804.

The spelling of 87688791 in words is "eighty-seven million, six hundred eighty-eight thousand, seven hundred ninety-one".