194289943 has 4 divisors (see below), whose sum is σ = 194321368. Its totient is φ = 194258520.

The previous prime is 194289929. The next prime is 194289967. The reversal of 194289943 is 349982491.

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 194289943 - 2¹³ = 194281751 is a prime.

It is a super-3 number, since 3×194289943³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194289913) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 3021 + ... + 19942.

It is an arithmetic number, because the mean of its divisors is an integer number (48580342).

Almost surely, 2^194289943 is an apocalyptic number.

194289943 is a deficient number, since it is larger than the sum of its proper divisors (31425).

194289943 is an equidigital number, since it uses as much as digits as its factorization.

194289943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31424.

The product of its digits is 559872, while the sum is 49.

The square root of 194289943 is about 13938.7927382539. The cubic root of 194289943 is about 579.1842903067.

The spelling of 194289943 in words is "one hundred ninety-four million, two hundred eighty-nine thousand, nine hundred forty-three".