87658791 has 16 divisors (see below), whose sum is σ = 127843968. Its totient is φ = 52984800.

The previous prime is 87658789. The next prime is 87658849. The reversal of 87658791 is 19785678.

It is not a de Polignac number, because 87658791 - 2¹ = 87658789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87650791) 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 15 ways as a sum of consecutive naturals, for example, 9756 + ... + 16446.

It is an arithmetic number, because the mean of its divisors is an integer number (7990248).

Almost surely, 2^87658791 is an apocalyptic number.

87658791 is a deficient number, since it is larger than the sum of its proper divisors (40185177).

87658791 is a wasteful number, since it uses less digits than its factorization.

87658791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7102.

The product of its digits is 846720, while the sum is 51.

The square root of 87658791 is about 9362.6273556091. The cubic root of 87658791 is about 444.2203931801.

It can be divided in two parts, 876587 and 91, that added together give a palindrome (876678).

The spelling of 87658791 in words is "eighty-seven million, six hundred fifty-eight thousand, seven hundred ninety-one".