194494859 has 4 divisors (see below), whose sum is σ = 209456016. Its totient is φ = 179533704.

The previous prime is 194494823. The next prime is 194494871. The reversal of 194494859 is 958494491.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194494859 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 194494859.

It is not an unprimeable number, because it can be changed into a prime (194494879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7480559 + ... + 7480584.

It is an arithmetic number, because the mean of its divisors is an integer number (52364004).

Almost surely, 2^194494859 is an apocalyptic number.

194494859 is a deficient number, since it is larger than the sum of its proper divisors (14961157).

194494859 is a wasteful number, since it uses less digits than its factorization.

194494859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14961156.

The product of its digits is 1866240, while the sum is 53.

The square root of 194494859 is about 13946.1413659836. The cubic root of 194494859 is about 579.3878390607.

The spelling of 194494859 in words is "one hundred ninety-four million, four hundred ninety-four thousand, eight hundred fifty-nine".