194320538 has 4 divisors (see below), whose sum is σ = 291480810. Its totient is φ = 97160268.

The previous prime is 194320519. The next prime is 194320573. The reversal of 194320538 is 835023491.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 179211769 + 15108769 = 13387^2 + 3887^2 .

It is a junction number, because it is equal to n+sod(n) for n = 194320498 and 194320507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48580133 + ... + 48580136.

Almost surely, 2^194320538 is an apocalyptic number.

194320538 is a deficient number, since it is larger than the sum of its proper divisors (97160272).

194320538 is an equidigital number, since it uses as much as digits as its factorization.

194320538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97160271.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 194320538 is about 13939.8901717338. The cubic root of 194320538 is about 579.2146902561.

The spelling of 194320538 in words is "one hundred ninety-four million, three hundred twenty thousand, five hundred thirty-eight".