193140391 has 8 divisors (see below), whose sum is σ = 199386000. Its totient is φ = 186974592.

The previous prime is 193140373. The next prime is 193140397. The reversal of 193140391 is 193041391.

193140391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 193140391 - 2⁵ = 193140359 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 (193140397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15016 + ... + 24733.

It is an arithmetic number, because the mean of its divisors is an integer number (24923250).

Almost surely, 2^193140391 is an apocalyptic number.

193140391 is a deficient number, since it is larger than the sum of its proper divisors (6245609).

193140391 is a wasteful number, since it uses less digits than its factorization.

193140391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39905.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 193140391 is about 13897.4958535702. The cubic root of 193140391 is about 578.0397467509.

The spelling of 193140391 in words is "one hundred ninety-three million, one hundred forty thousand, three hundred ninety-one".