194930405 has 16 divisors (see below), whose sum is σ = 256936320. Its totient is φ = 141311808.

The previous prime is 194930401. The next prime is 194930419. The reversal of 194930405 is 504039491.

It is a cyclic number.

It is not a de Polignac number, because 194930405 - 2² = 194930401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194930401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42422 + ... + 46791.

It is an arithmetic number, because the mean of its divisors is an integer number (16058520).

Almost surely, 2^194930405 is an apocalyptic number.

It is an amenable number.

194930405 is a deficient number, since it is larger than the sum of its proper divisors (62005915).

194930405 is a wasteful number, since it uses less digits than its factorization.

194930405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89260.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 194930405 is about 13961.7479206581. The cubic root of 194930405 is about 579.8200045905.

Adding to 194930405 its reverse (504039491), we get a palindrome (698969896).

The spelling of 194930405 in words is "one hundred ninety-four million, nine hundred thirty thousand, four hundred five".