218738093 has 8 divisors (see below), whose sum is σ = 250077120. Its totient is φ = 187421760.

The previous prime is 218738087. The next prime is 218738111. The reversal of 218738093 is 390837812.

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 218738093 - 2⁶ = 218738029 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 218738093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218738293) 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, 29738 + ... + 36356.

It is an arithmetic number, because the mean of its divisors is an integer number (31259640).

Almost surely, 2^218738093 is an apocalyptic number.

It is an amenable number.

218738093 is a deficient number, since it is larger than the sum of its proper divisors (31339027).

218738093 is an equidigital number, since it uses as much as digits as its factorization.

218738093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11347.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 218738093 is about 14789.7969222028. The cubic root of 218738093 is about 602.5246334401.

The spelling of 218738093 in words is "two hundred eighteen million, seven hundred thirty-eight thousand, ninety-three".