194795821 has 8 divisors (see below), whose sum is σ = 214128288. Its totient is φ = 175734000.

The previous prime is 194795819. The next prime is 194795831. The reversal of 194795821 is 128597491.

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 194795821 - 2¹ = 194795819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194795801) 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, 66150 + ... + 69031.

It is an arithmetic number, because the mean of its divisors is an integer number (26766036).

Almost surely, 2^194795821 is an apocalyptic number.

194795821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

194795821 is a deficient number, since it is larger than the sum of its proper divisors (19332467).

194795821 is a wasteful number, since it uses less digits than its factorization.

194795821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135323.

The product of its digits is 181440, while the sum is 46.

The square root of 194795821 is about 13956.9273480949. The cubic root of 194795821 is about 579.6865339444.

The spelling of 194795821 in words is "one hundred ninety-four million, seven hundred ninety-five thousand, eight hundred twenty-one".