194923219 has 2 divisors, whose sum is σ = 194923220. Its totient is φ = 194923218.

The previous prime is 194923217. The next prime is 194923271. The reversal of 194923219 is 912329491.

It is a weak prime.

It is an emirp because it is prime and its reverse (912329491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 194923219 - 2¹ = 194923217 is a prime.

It is a super-2 number, since 2×194923219² = 75990122610643922, which contains 22 as substring.

Together with 194923217, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (194923217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97461609 + 97461610.

It is an arithmetic number, because the mean of its divisors is an integer number (97461610).

Almost surely, 2^194923219 is an apocalyptic number.

194923219 is a deficient number, since it is larger than the sum of its proper divisors (1).

194923219 is an equidigital number, since it uses as much as digits as its factorization.

194923219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 40.

The square root of 194923219 is about 13961.4905722849. The cubic root of 194923219 is about 579.8128795899.

The spelling of 194923219 in words is "one hundred ninety-four million, nine hundred twenty-three thousand, two hundred nineteen".