218873087 has 2 divisors, whose sum is σ = 218873088. Its totient is φ = 218873086.

The previous prime is 218873069. The next prime is 218873089. The reversal of 218873087 is 780378812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 218873087 - 2¹⁶ = 218807551 is a prime.

Together with 218873089, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218873089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109436543 + 109436544.

It is an arithmetic number, because the mean of its divisors is an integer number (109436544).

Almost surely, 2^218873087 is an apocalyptic number.

218873087 is a deficient number, since it is larger than the sum of its proper divisors (1).

218873087 is an equidigital number, since it uses as much as digits as its factorization.

218873087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150528, while the sum is 44.

The square root of 218873087 is about 14794.3599726382. The cubic root of 218873087 is about 602.6485571131.

The spelling of 218873087 in words is "two hundred eighteen million, eight hundred seventy-three thousand, eighty-seven".