193091317 has 6 divisors (see below), whose sum is σ = 194496578. Its totient is φ = 191688432.

The previous prime is 193091303. The next prime is 193091333. The reversal of 193091317 is 713190391.

It can be written as a sum of positive squares in 3 ways, for example, as 25492401 + 167598916 = 5049^2 + 12946^2 .

It is not a de Polignac number, because 193091317 - 2⁷ = 193091189 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 (193091347) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 173559 + ... + 174667.

Almost surely, 2^193091317 is an apocalyptic number.

It is an amenable number.

193091317 is a deficient number, since it is larger than the sum of its proper divisors (1405261).

193091317 is an frugal number, since it uses more digits than its factorization.

193091317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375 (or 1266 counting only the distinct ones).

The product of its (nonzero) digits is 5103, while the sum is 34.

The square root of 193091317 is about 13895.7301715311. The cubic root of 193091317 is about 577.9907856036.

The spelling of 193091317 in words is "one hundred ninety-three million, ninety-one thousand, three hundred seventeen".