87518787 has 8 divisors (see below), whose sum is σ = 116735760. Its totient is φ = 58323840.

The previous prime is 87518779. The next prime is 87518813. The reversal of 87518787 is 78781578.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87518787 - 2³ = 87518779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87518777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10039 + ... + 16607.

It is an arithmetic number, because the mean of its divisors is an integer number (14591970).

Almost surely, 2^87518787 is an apocalyptic number.

87518787 is a deficient number, since it is larger than the sum of its proper divisors (29216973).

87518787 is a wasteful number, since it uses less digits than its factorization.

87518787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11013.

The product of its digits is 878080, while the sum is 51.

The square root of 87518787 is about 9355.1476204280. The cubic root of 87518787 is about 443.9837720309.

The spelling of 87518787 in words is "eighty-seven million, five hundred eighteen thousand, seven hundred eighty-seven".