193664071 has 8 divisors (see below), whose sum is σ = 202305024. Its totient is φ = 185041560.

The previous prime is 193664057. The next prime is 193664077. The reversal of 193664071 is 170466391.

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 193664071 - 2⁹ = 193663559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 193664071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193664077) 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, 19630 + ... + 27796.

It is an arithmetic number, because the mean of its divisors is an integer number (25288128).

Almost surely, 2^193664071 is an apocalyptic number.

193664071 is a deficient number, since it is larger than the sum of its proper divisors (8640953).

193664071 is a wasteful number, since it uses less digits than its factorization.

193664071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9221.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 193664071 is about 13916.3239039626. The cubic root of 193664071 is about 578.5617067570.

The spelling of 193664071 in words is "one hundred ninety-three million, six hundred sixty-four thousand, seventy-one".