217394 has 8 divisors (see below), whose sum is σ = 330780. Its totient is φ = 107136.

The previous prime is 217387. The next prime is 217397. The reversal of 217394 is 493712.

217394 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 214369 + 3025 = 463^2 + 55^2 .

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

It is not an unprimeable number, because it can be changed into a prime (217397) 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, 599 + ... + 890.

2²¹⁷³⁹⁴ is an apocalyptic number.

217394 is a deficient number, since it is larger than the sum of its proper divisors (113386).

217394 is a wasteful number, since it uses less digits than its factorization.

217394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1564.

The product of its digits is 1512, while the sum is 26.

The square root of 217394 is about 466.2552948761. The cubic root of 217394 is about 60.1287973968.

The spelling of 217394 in words is "two hundred seventeen thousand, three hundred ninety-four".