194680217 has 4 divisors (see below), whose sum is σ = 200960256. Its totient is φ = 188400180.

The previous prime is 194680193. The next prime is 194680229. The reversal of 194680217 is 712086491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 194680217 - 2⁶ = 194680153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194680237) 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, 3139973 + ... + 3140034.

It is an arithmetic number, because the mean of its divisors is an integer number (50240064).

Almost surely, 2^194680217 is an apocalyptic number.

It is an amenable number.

194680217 is a deficient number, since it is larger than the sum of its proper divisors (6280039).

194680217 is an equidigital number, since it uses as much as digits as its factorization.

194680217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6280038.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 194680217 is about 13952.7852774993. The cubic root of 194680217 is about 579.5718371936.

The spelling of 194680217 in words is "one hundred ninety-four million, six hundred eighty thousand, two hundred seventeen".