193640313 has 4 divisors (see below), whose sum is σ = 258187088. Its totient is φ = 129093540.

The previous prime is 193640299. The next prime is 193640327. The reversal of 193640313 is 313046391.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (193640299) and next prime (193640327).

It is not a de Polignac number, because 193640313 - 2⁵ = 193640281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (193640393) 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, 32273383 + ... + 32273388.

It is an arithmetic number, because the mean of its divisors is an integer number (64546772).

Almost surely, 2^193640313 is an apocalyptic number.

It is an amenable number.

193640313 is a deficient number, since it is larger than the sum of its proper divisors (64546775).

193640313 is an equidigital number, since it uses as much as digits as its factorization.

193640313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64546774.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 193640313 is about 13915.4702759195. The cubic root of 193640313 is about 578.5380471781.

The spelling of 193640313 in words is "one hundred ninety-three million, six hundred forty thousand, three hundred thirteen".