218968087 has 8 divisors (see below), whose sum is σ = 236078640. Its totient is φ = 201895680.

The previous prime is 218968063. The next prime is 218968111. The reversal of 218968087 is 780869812.

It is an interprime number because it is at equal distance from previous prime (218968063) and next prime (218968111).

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

It is a cyclic number.

It is not a de Polignac number, because 218968087 - 2¹⁵ = 218935319 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 218968087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218968187) 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, 3012 + ... + 21142.

It is an arithmetic number, because the mean of its divisors is an integer number (29509830).

Almost surely, 2^218968087 is an apocalyptic number.

218968087 is a deficient number, since it is larger than the sum of its proper divisors (17110553).

218968087 is a wasteful number, since it uses less digits than its factorization.

218968087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19073.

The product of its (nonzero) digits is 387072, while the sum is 49.

The square root of 218968087 is about 14797.5703073173. The cubic root of 218968087 is about 602.7357359931.

The spelling of 218968087 in words is "two hundred eighteen million, nine hundred sixty-eight thousand, eighty-seven".