87518291 has 8 divisors (see below), whose sum is σ = 100581120. Its totient is φ = 74595528.

The previous prime is 87518267. The next prime is 87518309. The reversal of 87518291 is 19281578.

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

It is a de Polignac number, because none of the positive numbers 2^k-87518291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87518891) 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, 33671 + ... + 36176.

It is an arithmetic number, because the mean of its divisors is an integer number (12572640).

Almost surely, 2^87518291 is an apocalyptic number.

87518291 is a deficient number, since it is larger than the sum of its proper divisors (13062829).

87518291 is a wasteful number, since it uses less digits than its factorization.

87518291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70033.

The product of its digits is 40320, while the sum is 41.

The square root of 87518291 is about 9355.1211109210. The cubic root of 87518291 is about 443.9829332915.

The spelling of 87518291 in words is "eighty-seven million, five hundred eighteen thousand, two hundred ninety-one".