194218093 has 4 divisors (see below), whose sum is σ = 194651100. Its totient is φ = 193785088.

The previous prime is 194218021. The next prime is 194218099. The reversal of 194218093 is 390812491.

194218093 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67272804 + 126945289 = 8202^2 + 11267^2 .

It is a cyclic number.

It is not a de Polignac number, because 194218093 - 2¹³ = 194209901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194218099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215830 + ... + 216727.

It is an arithmetic number, because the mean of its divisors is an integer number (48662775).

Almost surely, 2^194218093 is an apocalyptic number.

It is an amenable number.

194218093 is a deficient number, since it is larger than the sum of its proper divisors (433007).

194218093 is an equidigital number, since it uses as much as digits as its factorization.

194218093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433006.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 194218093 is about 13936.2151605090. The cubic root of 194218093 is about 579.1128858181.

The spelling of 194218093 in words is "one hundred ninety-four million, two hundred eighteen thousand, ninety-three".