194231693 has 4 divisors (see below), whose sum is σ = 194263740. Its totient is φ = 194199648.

The previous prime is 194231689. The next prime is 194231707. The reversal of 194231693 is 396132491.

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

It can be written as a sum of positive squares in 2 ways, for example, as 157301764 + 36929929 = 12542^2 + 6077^2 .

It is a cyclic number.

It is not a de Polignac number, because 194231693 - 2² = 194231689 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194231633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3848 + ... + 20081.

It is an arithmetic number, because the mean of its divisors is an integer number (48565935).

Almost surely, 2^194231693 is an apocalyptic number.

It is an amenable number.

194231693 is a deficient number, since it is larger than the sum of its proper divisors (32047).

194231693 is an equidigital number, since it uses as much as digits as its factorization.

194231693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32046.

The product of its digits is 34992, while the sum is 38.

The square root of 194231693 is about 13936.7030893250. The cubic root of 194231693 is about 579.1264028413.

The spelling of 194231693 in words is "one hundred ninety-four million, two hundred thirty-one thousand, six hundred ninety-three".