194412813 has 16 divisors (see below), whose sum is σ = 309129216. Its totient is φ = 106262640.

The previous prime is 194412787. The next prime is 194412817. The reversal of 194412813 is 318214491.

It is a happy number.

It is not a de Polignac number, because 194412813 - 2⁸ = 194412557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194412817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200773 + ... + 201738.

It is an arithmetic number, because the mean of its divisors is an integer number (19320576).

Almost surely, 2^194412813 is an apocalyptic number.

It is an amenable number.

194412813 is a deficient number, since it is larger than the sum of its proper divisors (114716403).

194412813 is a wasteful number, since it uses less digits than its factorization.

194412813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402544.

The product of its digits is 6912, while the sum is 33.

The square root of 194412813 is about 13943.1995252166. The cubic root of 194412813 is about 579.3063576602.

The spelling of 194412813 in words is "one hundred ninety-four million, four hundred twelve thousand, eight hundred thirteen".