194742813 has 8 divisors (see below), whose sum is σ = 261158688. Its totient is φ = 129077744.

The previous prime is 194742811. The next prime is 194742839. The reversal of 194742813 is 318247491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 194742813 - 2¹ = 194742811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194742811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187095 + ... + 188132.

It is an arithmetic number, because the mean of its divisors is an integer number (32644836).

Almost surely, 2^194742813 is an apocalyptic number.

It is an amenable number.

194742813 is a deficient number, since it is larger than the sum of its proper divisors (66415875).

194742813 is a wasteful number, since it uses less digits than its factorization.

194742813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375403.

The product of its digits is 48384, while the sum is 39.

The square root of 194742813 is about 13955.0282335795. The cubic root of 194742813 is about 579.6339475811.

The spelling of 194742813 in words is "one hundred ninety-four million, seven hundred forty-two thousand, eight hundred thirteen".