194378263 has 4 divisors (see below), whose sum is σ = 194593480. Its totient is φ = 194163048.

The previous prime is 194378231. The next prime is 194378291. The reversal of 194378263 is 362873491.

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

It is a cyclic number.

It is not a de Polignac number, because 194378263 - 2⁵ = 194378231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194378563) 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 3 ways as a sum of consecutive naturals, for example, 106248 + ... + 108061.

It is an arithmetic number, because the mean of its divisors is an integer number (48648370).

Almost surely, 2^194378263 is an apocalyptic number.

194378263 is a deficient number, since it is larger than the sum of its proper divisors (215217).

194378263 is an equidigital number, since it uses as much as digits as its factorization.

194378263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215216.

The product of its digits is 217728, while the sum is 43.

The square root of 194378263 is about 13941.9605149348. The cubic root of 194378263 is about 579.2720385566.

The spelling of 194378263 in words is "one hundred ninety-four million, three hundred seventy-eight thousand, two hundred sixty-three".