194528993 has 8 divisors (see below), whose sum is σ = 196837056. Its totient is φ = 192229200.

The previous prime is 194528981. The next prime is 194529007. The reversal of 194528993 is 399825491.

It is a happy number.

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 194528993 - 2¹⁴ = 194512609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (194528923) 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 7 ways as a sum of consecutive naturals, for example, 53978 + ... + 57468.

It is an arithmetic number, because the mean of its divisors is an integer number (24604632).

Almost surely, 2^194528993 is an apocalyptic number.

It is an amenable number.

194528993 is a deficient number, since it is larger than the sum of its proper divisors (2308063).

194528993 is a wasteful number, since it uses less digits than its factorization.

194528993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4135.

The product of its digits is 699840, while the sum is 50.

The square root of 194528993 is about 13947.3650916580. The cubic root of 194528993 is about 579.4217314178.

The spelling of 194528993 in words is "one hundred ninety-four million, five hundred twenty-eight thousand, nine hundred ninety-three".