194940919 has 2 divisors, whose sum is σ = 194940920. Its totient is φ = 194940918.

The previous prime is 194940917. The next prime is 194940923. The reversal of 194940919 is 919049491.

It is a weak prime.

It is an emirp because it is prime and its reverse (919049491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 194940919 - 2¹ = 194940917 is a prime.

It is a super-2 number, since 2×194940919² = 76003923801129122, which contains 22 as substring.

Together with 194940917, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194940917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97470459 + 97470460.

It is an arithmetic number, because the mean of its divisors is an integer number (97470460).

Almost surely, 2^194940919 is an apocalyptic number.

194940919 is a deficient number, since it is larger than the sum of its proper divisors (1).

194940919 is an equidigital number, since it uses as much as digits as its factorization.

194940919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 46.

The square root of 194940919 is about 13962.1244443673. The cubic root of 194940919 is about 579.8304290253.

The spelling of 194940919 in words is "one hundred ninety-four million, nine hundred forty thousand, nine hundred nineteen".